TY - JOUR AU - I. V. Maiorov TI - A problem of Frankl' for a nonlinear equation of mixed type JO - Differencialʹnye uravneniâ PY - 1968 SP - 46 EP - 51 VL - 4 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1968_4_1_a3/ LA - ru ID - DE_1968_4_1_a3 ER -