Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1962__12_4_a4, author = {Vala, Josef}, title = {O kongruenci $W$ s fok\'aln{\'\i}mi plochami p\v{r}{\'\i}mkov\'ymi}, journal = {Mathematica slovaca}, pages = {271--279}, publisher = {mathdoc}, volume = {12}, number = {4}, year = {1962}, mrnumber = {0160164}, zbl = {0124.14201}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/MASLO_1962__12_4_a4/} }
Vala, Josef. O kongruenci $W$ s fokálními plochami přímkovými. Mathematica slovaca, Tome 12 (1962) no. 4, pp. 271-279. http://geodesic.mathdoc.fr/item/MASLO_1962__12_4_a4/