TY - JOUR AU - V. M. Koltyzhenkov TI - Irregular second-order differential equations with almost-periodic coefficients JO - Matematičeskie zametki PY - 1987 SP - 202 EP - 206 VL - 41 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1987_41_2_a8/ LA - ru ID - MZM_1987_41_2_a8 ER -