TY - JOUR AU - S. I. Gaiduk TI - A certain mixed problem for a system of equations with piecewise constant coefficients JO - Differencialʹnye uravneniâ PY - 1975 SP - 309 EP - 322 VL - 11 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1975_11_2_a11/ LA - ru ID - DE_1975_11_2_a11 ER -