TY - JOUR AU - V. G. Kopp TI - Classification of infinitely small motions and their bundles in 4-dimensional Lorentz space JO - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki PY - 1963 SP - 59 EP - 77 VL - 123 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZKU_1963_123_1_a3/ LA - ru ID - UZKU_1963_123_1_a3 ER -