TY  - JOUR
AU  - I. I. Martynov
TI  - Systems with a piecewise constant matrix of coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 1135
EP  - 1137
VL  - 13
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_6_a21/
LA  - ru
ID  - DE_1977_13_6_a21
ER  -