TY  - JOUR
AU  - L. A. Kalyakin
TI  - On approximate methods of solving nonlinear boundary value problems with a~small parameter
JO  - Sbornik. Mathematics
PY  - 1976
SP  - 491
EP  - 500
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1976_28_4_a3/
LA  - en
ID  - SM_1976_28_4_a3
ER  -