Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1957_115_4_a7, author = {S. I. Savel'ev}, title = {Surfaces with plane generatrices along which the tangent plane is constant}, journal = {Doklady Akademii Nauk}, pages = {663--665}, publisher = {mathdoc}, volume = {115}, number = {4}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_115_4_a7/} }
S. I. Savel'ev. Surfaces with plane generatrices along which the tangent plane is constant. Doklady Akademii Nauk, Tome 115 (1957) no. 4, pp. 663-665. http://geodesic.mathdoc.fr/item/DAN_1957_115_4_a7/