TY - JOUR AU - I. Yu. Kolpakov TI - On the solvability of the periodic boundary-value problem for a first-order differential equation unsolved with respect to the derivative JO - Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory PY - 2017 SP - 50 EP - 52 VL - 132 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTO_2017_132_a10/ LA - ru ID - INTO_2017_132_a10 ER -