TY - JOUR AU - Yu. N. Bibikov TI - Quasiperiodic solutions of two-dimensional periodic systems of differential equations of neutral type depending on a small parameter JO - Differencialʹnye uravneniâ PY - 1982 SP - 1980 EP - 1982 VL - 18 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1982_18_11_a18/ LA - ru ID - DE_1982_18_11_a18 ER -