TY  - JOUR
AU  - N. Satimov
TI  - Some generalizations of L.\,S.~Pontryagin's square lemma
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 1548
EP  - 1555
VL  - 20
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_9_a9/
LA  - ru
ID  - DE_1984_20_9_a9
ER  -