TY - JOUR AU - V. V. Zhikov TI - Monotonicity in the theory of almost periodic solutions of nonlinear operator equations JO - Sbornik. Mathematics PY - 1973 SP - 209 EP - 223 VL - 19 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1973_19_2_a4/ LA - en ID - SM_1973_19_2_a4 ER -