@article{105128, author = {V\'aclav Havel}, title = {One generalization of the fourth harmonic point (Preliminary communication)}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {008}, year = {1967}, pages = {463-467}, zbl = {0155.49001}, mrnumber = {0225221}, language = {en}, url = {http://dml.mathdoc.fr/item/105128} }
Havel, Václav. One generalization of the fourth harmonic point (Preliminary communication). Commentationes Mathematicae Universitatis Carolinae, Tome 008 (1967) pp. 463-467. http://gdmltest.u-ga.fr/item/105128/
Recent advances in the foundations of Euclidean geometry, Amer. Math. Monthly 62 (1955), No. 7, Part II, 1-17. (1955) | MR 0073213