TY  - JOUR
AU  - V. A. Baikov
AU  - R. K. Gazizov
AU  - N. Kh. Ibragimov
TI  - Approximate symmetries and preservation laws
JO  - Informatics and Automation
PY  - 1991
SP  - 35
EP  - 45
VL  - 200
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1991_200_a3/
LA  - ru
ID  - TRSPY_1991_200_a3
ER  -