TY  - JOUR
AU  - S. A. Pak
TI  - A priori estimate of solutions of boundary value problems for second order ordinary nonlinear differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 890
EP  - 897
VL  - 3
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_6_a1/
LA  - ru
ID  - DE_1967_3_6_a1
ER  -