TY  - JOUR
AU  - L. V. Kantorovich
TI  - On differential equations of the form $x''=f(x)$
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1949
SP  - 148
EP  - 151
VL  - 28
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1949_28_a6/
LA  - ru
ID  - TM_1949_28_a6
ER  -