TY - JOUR AU - V. N. Laptinskii TI - Linear systems with periodic coefficients JO - Differencialʹnye uravneniâ PY - 1975 SP - 1899 EP - 1901 VL - 11 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1975_11_10_a24/ LA - ru ID - DE_1975_11_10_a24 ER -