Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1970__20_1_a1, author = {Vala, Josef}, title = {\"Uber die involutorischen {Paare} der {Regelfl\"achen}}, journal = {Mathematica slovaca}, pages = {11--26}, publisher = {mathdoc}, volume = {20}, number = {1}, year = {1970}, mrnumber = {0301649}, zbl = {0193.21802}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/MASLO_1970__20_1_a1/} }
Vala, Josef. Über die involutorischen Paare der Regelflächen. Mathematica slovaca, Tome 20 (1970) no. 1, pp. 11-26. http://geodesic.mathdoc.fr/item/MASLO_1970__20_1_a1/