@article{106978, author = {Bahman Mehri}, title = {A note on periodic solution of second order non-linear differential equations}, journal = {Archivum Mathematicum}, volume = {013}, year = {1977}, pages = {191-194}, zbl = {0394.34034}, mrnumber = {0477244}, language = {en}, url = {http://dml.mathdoc.fr/item/106978} }
Mehri, Bahman. A note on periodic solution of second order non-linear differential equations. Archivum Mathematicum, Tome 013 (1977) pp. 191-194. http://gdmltest.u-ga.fr/item/106978/
A note on periodic solutions of second order ordinary differential equations, SIAM J. Appl. Math. Vol. 21 (1971), pp. 491-494. (1971) | MR 0304781 | Zbl 0238.34073
On the existence of periodic solutions of nonlinear second order differential equations, SIAM J. Appl. Math. Vol. 29, No. 1, July 1975, pp. 72-76. (1975) | MR 0369824 | Zbl 0322.34027
On periodic solutions of non-linear second order differential equations, Prague conference on nonlinear Vibrations 1967 pp. 175-180. (1967) | MR 0340726
Položiteľnyje rešenija operatornych uravnenij, Moskva 1962. (1962)