TY - JOUR AU - M. E. Tsypkin TI - Application of Kotelnikov's transport principle to the theory of ruled surfaces JO - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki PY - 1952 SP - 101 EP - 107 VL - 112 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZKU_1952_112_10_a7/ LA - ru ID - UZKU_1952_112_10_a7 ER -