TY - JOUR AU - B. L. Rozhdestvenskii TI - A system of quasi-linear equations in the theory of surfaces JO - Doklady Akademii Nauk PY - 1962 SP - 50 EP - 52 VL - 143 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1962_143_1_a12/ LA - ru ID - DAN_1962_143_1_a12 ER -