TY  - JOUR
AU  - È. M. Solnechnyi
TI  - On the causality of operators that arise in problems of mathematical physics with weak nonlinearities
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 801
EP  - 808
VL  - 35
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_6_a11/
LA  - ru
ID  - DE_1999_35_6_a11
ER  -