TY  - JOUR
AU  - A. B. Vasil'eva
AU  - V. A. Anikeeva
TI  - Contrast structures with steps in systems of singularly perturbed equations
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 1999
SP  - 791
EP  - 800
VL  - 5
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_1999_5_3_a9/
LA  - ru
ID  - FPM_1999_5_3_a9
ER  -