Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1965__15_2_a2, author = {Vala, Josef}, title = {Spezielle {Doppelverh\"altnisscharen} auf {Regelfl\"achen}}, journal = {Mathematica slovaca}, pages = {126--142}, publisher = {mathdoc}, volume = {15}, number = {2}, year = {1965}, mrnumber = {0217710}, zbl = {0133.14702}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/MASLO_1965__15_2_a2/} }
Vala, Josef. Spezielle Doppelverhältnisscharen auf Regelflächen. Mathematica slovaca, Tome 15 (1965) no. 2, pp. 126-142. http://geodesic.mathdoc.fr/item/MASLO_1965__15_2_a2/