On the non-generic Tzitzeica-Johnson's Configuration

[1] D. Barbilian - Pagini inedite, volume 2, Editors G. Barbilian and V. G. Vodă, Editura Albatros, 1984.Search in Google Scholar

[2] W. Boskoff, S. Barcanescu - On the Tzitzeica-Johnson configuration, Jour- nal of Geometry, 96(2009), 57-61.10.1007/s00022-010-0022-6Search in Google Scholar

[3] W. Boskoff and P. Horja - The characterization of some special Barbilian spaces using the Tzitzeica construction, Stud. Cere. Mat. 46 (1994), No. 5, 503-514.Search in Google Scholar

[4] A. Emch - Remarks on the foregoing circle theorem, American Mathemat- ical Monthly, 23(1916), 162-164.10.1080/00029890.1916.11998201Search in Google Scholar

[5] M. J. Greenberg - Anstotle’s axiom in the foundations of geometry J. Geom. 33(1988), 53-57. 10.1007/BF01230603Search in Google Scholar

[6] M. J. Greenberg - Euclidean and Non-Euclidean geometries, Development and history, Third edition, W. H. Freeman & Co., 1993.Search in Google Scholar

[7] R. Hartshorne - Non-Euclidean III.36 Amer. Math. Monthly 110(2003), 495-502.10.1080/00029890.2003.11919987Search in Google Scholar

[8] D. Hilbert - The Foundations of Geometry, Open Court Publishing Com- pany, La Salle, 19G2 (reprint of the translation by E. J. Townsend, 1902).Search in Google Scholar

[9] R. A. Johnson - A Circle Theorem, Amer. Math. Monthly, 23(1916), 161-162.10.1080/00029890.1916.11998200Search in Google Scholar

[10] B. Kerekjarto Les fondements de la geometrie, vol. 1, Akad. Kiado, Bu- dapest, 1955.Search in Google Scholar

[11] T. Lalescu - Geometry of the Triangle (in Romanian: Geometria triunghi- ului), Ed. Apollo, 1993 (original French edition in 1937).Search in Google Scholar

[12] N. N. Mihăileanu - Complementary Lessons in Geometry, (in Romanian: Lecţii complementare de geometrie), Editura didactică şi pedagogică, Bu- cureşti, 1976.Search in Google Scholar

[13] N. N. Mihăileanu et al. - A Problem Book of Synthetic and Projective Geometry (in Romanian: Culegere de probleme de geometrie sintetică şi proiectivă), Editura didactică şi pedagogică, 1971.Search in Google Scholar

[14] V. Pambuccian - Zum Stufenaufbau des Parallelenaxioms J. Geom. 51(1994), 79-88.10.1007/BF01226859Search in Google Scholar

[15] V. Pambuccian - Constructive axiomatizations of plane absolute, Eu- clidean and hyperbolic geometry Math. Log. Q. 47(2001), 129-135.10.1002/1521-3870(200101)47:1<129::AID-MALQ129>3.0.CO;2-BSearch in Google Scholar

[16] G. Pólya - Mathematical discovery. On understanding, learning, and teaching problem solving, Reprint in one volume. With a foreword by Pe- ter Hilton. With a bibliography by Gerald Alexanderson. With an index by Jean Pedersen. John Wiley &: Sons, Inc., New York, 1981, xxv-1-220 pp.Search in Google Scholar

[17] G. Tzitzeica On a Euler’s 77ieorem(romanian). Gazeta Matematică, 13(1907), 293-294.Search in Google Scholar

[18] G. Ţiţeica - Problems of Geometry (in Romanian: Probleme de geometrie, Sixth Edition, with foreword by Gh. D. Simionescu, Editura Tehnică, 1962, reprinted 1981. Search in Google Scholar

[19] V. Gh. Vodă - The Charm of Old-Fashioned Geometry (in Roma- nian:Vraja geometriei demodate), Editura Albatros, 1983.Search in Google Scholar