@article{1261415776, author = {TAKEDA, Kusuo}, title = {Principal ruled surfaces of a rectilinear congruence.}, journal = {J. Math. Soc. Japan}, volume = {4}, number = {3-4}, year = {1952}, pages = { 286-295}, language = {en}, url = {http://dml.mathdoc.fr/item/1261415776} }
TAKEDA, Kusuo. Principal ruled surfaces of a rectilinear congruence.. J. Math. Soc. Japan, Tome 4 (1952) no. 3-4, pp. 286-295. http://gdmltest.u-ga.fr/item/1261415776/