TY - JOUR AU - V. A. Kondrat'ev AU - E. M. Landis TI - On qualitative properties of solutions of a~nonlinear equation of second order JO - Sbornik. Mathematics PY - 1989 SP - 337 EP - 350 VL - 63 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1989_63_2_a4/ LA - en ID - SM_1989_63_2_a4 ER -