[Bacilieri R, A Ducousso, RJ Petit and A Kremer (1996) Mating system and asymetric hybridization in a mixed stand of European oaks. Evolution 50:900-908 https://doi.org/10.1111/j.1558-5646.1996.tb03898.x10.1111/j.1558-5646.1996.tb03898.x28568948]Open DOISearch in Google Scholar
[Blatny T and T Stastny (1959) Natural distribution of forest trees in Slovakia. Slovak Publisher of Agriculture Literature, Bratislava, 420 p [In Slovak]]Search in Google Scholar
[Bobowicz MA, BR Stephan and W Prus-Głowacki (2000) Genetic variation of F1 hybrids from controlled crosses between Pinus montana var. rostrata and Pinus sylvestris in anatomical needle traits. Acta Societatis Botanicorum Poloniae 69:207-214. https://doi.org/10.5586/asbp.2000.02810.5586/asbp.2000.028]Open DOISearch in Google Scholar
[Boratyński A, K Boratyńska, A Lewandowski, Z Gołab and P Kiciński (2003) Evidence of the possibility of natural reciprocal crosses between P. sylvestris and P. uliginosa based on phenology of reproductive organs. Flora 198: 1227-123910.1078/0367-2530-00110]Search in Google Scholar
[Buchholz JT (1944) The cause of sterility in cross-pollinations between certain species of pines. American Journal of Botany 31: 25]Search in Google Scholar
[Businsky R (1999) Taxonomic essay in the Pinus mugo complex and its hybrid populations. Acta Průhoniciana 68:123-143]Search in Google Scholar
[Celiński K, H Kijak, A Wojnicka-Półtorak, K Buczkowska-Chmielewska, J Sokołowska and E Chudzińska (2017) Effectiveness of the DNA barcoding approach for closely related conifers discrimination: A case study of the Pinus mugo complex. Comptes Rendus Biologies 340:339-348 https://doi.org/10.1016/j.crvi.2017.06.00210.1016/j.crvi.2017.06.00228711357]Open DOISearch in Google Scholar
[Chamberlain CJ (1935) Gymnosperms, Structure and Evolution. University of Chicago Press, Dover Publications, Inc. New York, 484 p https://doi.org/10.5962/bhl.title.1023910.5962/bhl.title.10239]Open DOISearch in Google Scholar
[Christensen KJ (1987) A morphometric study of the Pinus mugo Turra complex and its hybridization with P. sylvestris. Feddes Repertorium 98:623-635 https://doi.org/10.1002/fedr.1987098111310.1002/fedr.19870981113]Open DOISearch in Google Scholar
[Christensen KJ and GH Dar (1997) A morphometric analysis of spontaneous and artificial hybrids of P. mugo × sylvestris (Pinaceae). Nordic Journal of Botany 17:77-86. https://doi.org/10.1111/j.1756-1051.1997.tb00291.x10.1111/j.1756-1051.1997.tb00291.x]Open DOISearch in Google Scholar
[Danusevichius D, V Marozas, G Brazaitis, R Petrokas and KI Christensen (2012) Spontaneous hybridization between Pinus mugo and Pinus sylvestris at the Lithuanian seaside: A morphological survey. The ScientificWorld Journal. https://doi.org/10.1100/2012/17240710.1100/2012/172407334911622619615]Open DOISearch in Google Scholar
[Darwin Ch (1859) The origin of species by means of natural selection. John Murray, London, 440 p]Search in Google Scholar
[Dogra PD (1967) Seed sterility and disturbances in embryogeny in conifers with particular reference to seed testing and tree breeding in Pinaceae. Studia Forestalia Suecica 45:68-96]Search in Google Scholar
[Duffield JW (1952) Relationships and species hybridization in the genus Pinus. Zeitschrift für Forstgenetik und Forstpflanzenzüchtung 1:93-97]Search in Google Scholar
[Goroshkevich SN (2004) Natural hybridization between Russian stone pine (Pinus sibirica) and Japanese stone pine (Pinus pumila). In: Sniezko R S, S Samman, D Schlarbaum and HB Kriebel (eds) Breeding and Genetics of Five-needle Pines: growth, adaptability, and pest resistance: IUFRO Working Party 2.02.15. Medford, 24-25 July 2001, pp 169-174]Search in Google Scholar
[Goroshkevich SN, AG Popov and GV Vasilieva (2008) Ecological and morphological studies in the hybrid zone between Pinus sibirica and Pinus pumila. Annals of Forest Research 51:43-52]Search in Google Scholar
[Kang K.-S, AD Bila, AM Harju and D Lindgren (2003) Estimation of fertility variation in forest tree populations. Forestry 76:329-344 https://doi.org/10.1093/forestry/76.3.32910.1093/forestry/76.3.329]Open DOISearch in Google Scholar
[Kormutak A (1984) Some cytological and biochemical aspects of interspecific incompatibility in pines (Pinus sp.). Acta Dendrobiologica, VEDA Publisher, Bratislava, 92 p]Search in Google Scholar
[Kormutak A, J Bohovicova, B Vookova and D Gőmőry (2007) Pollen viability in hybrid swarms of Pinus mugo Turra and P. sylvestris L. Acta Biologica Cracoviensia, Series Botanica 49(1):61-66]Search in Google Scholar
[Kormutak A, B Vookova, V Camek, P Bolecek and D Gőmőry (2008) Pollen size and viability in hybrid swarm populations of Pinus mugo Turra and P. sylvestris L. Thaiszia - Journal of Botany 18:93-100]Search in Google Scholar
[Kormutak A, B Vookova, P Manka, J Salaj, V Camek and D Gömöry (2008a) Abortive embryogenesis in hybrid swarm populations of Pinus sylvestris L. and Pinus mugo Turra. Trees 22:657-662 https://doi.org/10.1007/s00468-008-0223-x10.1007/s00468-008-0223-x]Open DOISearch in Google Scholar
[Kormutak A, P Manka, B Vookova, T Salaj, V Camek, P Bolecek and D Gömöry (2009) Seed quality in hybrid swarm populations of Pinus mugo Turra and P. sylvestris L. Plant Systematics and Evolution 277(3-4):245-250 https://doi.org/10.1007/s00606-008-0121-010.1007/s00606-008-0121-0]Open DOISearch in Google Scholar
[Kormutak A, M Galgoci, P Manka, M Koubova, M Jopcik, M Sukenikova, P Bolecek and D Gőmőry (2017) Field-based artificial crossings indicate partial compatibility of reciprocal crosses between Pinus sylvestris and Pinus mugo and unexpected chloroplast DNA inheritance. Tree Genetics and Genomes 13(3), article no. 68, ISSN 1614-2942 https://doi.org/10.1007/s11295-017-1152-x10.1007/s11295-017-1152-x]Open DOISearch in Google Scholar
[Kriebel HB (1967) The timing of the incompatibility reaction in interspecific crosses of Pinus strobus L. In Proceeding of 14th IUFRO Congress, Münich 1967, Part III, Sect 22:77-87]Search in Google Scholar
[Krugman SL (1970) Incompatibility and inviability systems among some western North American pines. In Proceeding of IUFRO Section 22, Working Group Meeting on Sexual Reproduction of Forest Trees, Varparanta, Finland 13 p]Search in Google Scholar
[Little EL and WB Critchfield (1969) Subdivisions of the genus Pinus (pines). USDA, Forest Service, Miscellaneous Publication no. 1144, 51 p McWilliam JR (1959) Interspecific incompatibility in Pinus. American Journal of Botany 46:425-433 https://doi.org/10.1002/j.1537-2197.1959.tb07033.x10.1002/j.1537-2197.1959.tb07033.x]Open DOISearch in Google Scholar
[Mirov NT (1967) The genus Pinus. Ronald Press Company, New York, 602 p https://doi.org/10.2307/400422910.2307/4004229]Open DOISearch in Google Scholar
[Moulalis D, C Bassiotis and D Mitsopoulos (1976) Controlled pollinations among pine species in Greece. Silvae Genetica 25(3-4):95-107]Search in Google Scholar
[Politov DV, MM Belokon, OP Maluchenko, YS Belokon, VN Molozhnikov, LE Mejnartowicz and KV Krutovskij (1999) Genetic evidence of natural hybridization between Siberian stone pine, Pinus sibirica Du Tour, and dwarf Siberian pine, P. pumila (Pall.) Regel. Forest Genetics 6(1):41-48]Search in Google Scholar
[Prus-Głowacki W and J Szweykowski (1980) Serological characteristics of some putative individuals from a Pinus sylvestris × Pinus mugo hybrid swarm population. Acta Societatis Botanicorum Poloniae 49(1-2):127-142 https://doi.org/10.5586/asbp.1980.01110.5586/asbp.1980.011]Open DOISearch in Google Scholar
[Prus-Głowacki W, J Sadowski, J Szweykowski and I Wiatroszak (1981) Quantitative and qualitative analysis of needle antigens of Pinus sylvestris, Pinus mugo, Pinus uliginosa and Pinus nigra and of some individuals from hybrid swarm population. Genetica Polonica 22(4):447-454]Search in Google Scholar
[Righter FI and P Stockwell (1949) The fertile species hybrid, Pinus murray-banksiana. Madrońo 10:65-69]Search in Google Scholar
[Sarvas R (1962) Investigations on the flowering and seed crop of Pinus sylvestris. Communicationes Instituti Forestalis Fenniae 53:1-198]Search in Google Scholar
[Sax K (1960) Meiosis in interspecific pine hybrids. Forest Science 6:135-138]Search in Google Scholar
[Sax K and MJ Sax (1933) Chromosome number and morphology in the conifers. Journal of Arnold Arboretum 14:357-375 https://doi.org/10.5962/bhl.part.995910.5962/bhl.part.9959]Open DOISearch in Google Scholar
[Saylor LC and BW Smith (1966) Meiotic irregularity in species and interspecific hybrids of Pinus. American Journal of Botany 53(5):453-468 https://doi.org/10.1002/j.1537-2197.1966.tb07358.x10.1002/j.1537-2197.1966.tb07358.x]Open DOISearch in Google Scholar
[Somora J (1981) The mountain dwarf pine (Pinus mugo Turra) in the Tatra National Reserve (Distribution, shape, varieties). Collectiones of Publications of the Tatra National Reserve 22:31-76 [In Slovak]]Search in Google Scholar
[Staszkiewicz J (1996) Natural hybrids of Pinus mugo × P. sylvestris (Pinaceae) in Tatra Mts. Fragmenta Floristica et Geobotanica, Series Polonica 3:23-30]Search in Google Scholar
[Stebbins GL-Jr (1950) Variation and Evolution in Plants. Columbia University Press, New York, 643 p10.7312/steb94536]Search in Google Scholar
[Viewegh J (1981) Variability of Pinus mugo × Pinus silvestris hybrid swarm on peat-bog in Zuberec of the Orava region. Folia Dendrologica 8(81): 41-59 [In Czech]]Search in Google Scholar
[Wachowiak W, K Celiński and W Prus-Glowacki (2005) Evidence of natural hybridisation between Pinus uliginosa and P. sylvestris in the sympatric population of the species. Flora 200:563-568 https://doi.org/10.1016/j.flora.2005.06.00710.1016/j.flora.2005.06.007]Open DOISearch in Google Scholar
[Wachowiak W, A Lewandowski and W Prus-Głowacki (2005) Reciprocal controlled crosses between Pinus sylvestris and P. mugo verified by a species-specific cpDNA marker. Journal of Applied Genetics 46(1):41-43]Search in Google Scholar
[Wachowiak W, J Odrzykoski, Ł Myczko and W Prus- Głowacki (2006) Lack of evidence on hybrid swarm in the sympatric population of Pinus mugo and P. sylvestris. Flora 201:307-316 https://doi.org/10.1016/j.flora.2005.08.00410.1016/j.flora.2005.08.004]Open DOISearch in Google Scholar
[Wachowiak W and W Prus-Głowacki (2008) Hybridisation processes in sympatric populations of pines Pinus sylvestris L., P. mugo Turra and P. uliginosa Neuman. Plant Systematics and Evolution 271(1-2):29-40 https://doi.org/10.1007/s00606-007-0609-z10.1007/s00606-007-0609-z]Open DOISearch in Google Scholar
[White TL, WT Adams and DB Neale (2009) Forest Genetics. Cromwell Press Group, Trowbridge, UK, 682 p.]Search in Google Scholar