TY - JOUR AU - G. V. Demidenko TI - Systems of differential equations with periodic coefficients JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2013 SP - 38 EP - 46 VL - 16 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJIM_2013_16_4_a3/ LA - ru ID - SJIM_2013_16_4_a3 ER -