TY  - JOUR
AU  - G. I. Kabak
TI  - Lower bounds for the minimum number of switching points
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 1088
EP  - 1090
VL  - 20
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_6_a21/
LA  - ru
ID  - DE_1984_20_6_a21
ER  -