TY  - JOUR
AU  - S. T. Zavalishchin
TI  - On the question of the general form of a linear equation.~I, II
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 791
EP  - 797
VL  - 7
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_5_a2/
LA  - ru
ID  - DE_1971_7_5_a2
ER  -