TY - JOUR AU - V. N. Pavlenko AU - O. V. Ul'yanova TI - Method of Upper and Lower Solutions for Parabolic-Type Equations with Discontinuous Nonlinearities JO - Differencialʹnye uravneniâ PY - 2002 SP - 499 EP - 504 VL - 38 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2002_38_4_a8/ LA - ru ID - DE_2002_38_4_a8 ER -