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Olita Medne, Rita Serzane and Liga Berzina-Cimdina

1699, February 13, 2014- [viewed 10 February 2015]. Available from: 10. Tammemagi, H.Y. The Waste Crisis: Landfills, Incinerators, and the Search for a Sustainable Future, Oxford University Press, 1999. 11. Kelvin T.W. Ng, Irene M.C. Lo. Fines migration from soil daily covers in Hong Kong landfills. Waste Management, 2010, vol. 30, Issue 11, p. 2047-2057. 12. Fantell, J. M., Flannagan T. The ABCs of Landfill ADCs [online]. Source: Waste Age, date: January 1

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Rositsa Vladeva

Sustainable Development. Geographical Views on Education for Sustainable Development, International Geographical Union, Commission on Geographical Education, 2007, 42, 27-39. [5]. Naredba №6/28.05.2001 za razpredelenie na uchebnoto vreme za dostigane na obshtoobrazovatelniya minimum po klasove, etapi i stepeni na obrazovanie. DV, 54, 2001. [6]. Naredba №4/30.11.2015 za uchebniya plan. DV, 94, 2015. [7]. Pravilnik za prilagane na Zakona za narodnata prosveta. DV, 68, 1999. [8]. Zakon za narodnata prosveta. DV

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Asya Dragoeva, Zheni Stoyanova, Vanya Koleva and Daniela Dragolova

, Fourth revised and enlarged edition, Sofia, 2012. [29]. Islam, A.K.M.M.; Kato-Noguchi, H., Allelopathic Potentiality of Medicinal Plant Leucas aspera, International Journal of Sustainable Agriculture. 2012, 4(1), 01-07. [30.] Kakati, B.; Baruah, A., Allelopathic Effect of Aqueous Extract of Some Medicinal Plants on Seed Germination and Seedling Length of Mung Bean (Vigna radiata (L.) Wilczek.), Indian Journal of Plant Sciences. 2013, 2, 8-11. [31]. Verma, S.K.; Kumar, S.; Pandey, V.; Verma, R.K.; Patra, D., Phytotoxic

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Teodora Koynova

Shumen Plateau, International Journal of Social Ecology and Sustainable Development , 2019 , 10(1), Article 4 – in press [8]. Gidlow, C.J.; Ellis, N.J.; Bostock, S., Development of the Neighbourhood Green Space Tool (NGST), Landscape and Urban Planning , 2012 , 106(4):347-358. [9]. Pietilä, M.; Neuvonen, M.; Borodulin, K.; Korpela, K.; Sievänen, T.; Tyrväinen, L., Relationships between exposure to urban green spaces, physical activity and self-rated health, Journal of Outdoor Recreation and Tourism

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Vanya Koleva, Teodora Koynova, Asya Dragoeva and Nikolay Natchev

References [1]. Koynova, T.; Koleva, V.; Dragoeva A.; Natchev, N., Peri-urban National Parks as Green Spaces for Recreation - A Case Study of Nature Park Shumen Plateau, International Journal of Social Ecology and Sustainable Development , 2019 , 10 (1): Article 4. – in press [2]. Carr, R.; Chaosheng, Z.; Norman, M., Identification and mapping of heavy metal pollution in soils of a sports ground in Galway City, Ireland, using a portable XRF analyser and GIS, Environ Geochem Health , 2008 , 30 (1):45-52. doi:10.1007/s10653-007-9106-0 [3