@article{10_21136_CPM_1978_117995,
     author = {Hamedani, Gharagoz G.},
     title = {On periodic solutions of nonlinear second order ordinary differential equations},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {380--383},
     publisher = {mathdoc},
     volume = {103},
     number = {4},
     year = {1978},
     doi = {10.21136/CPM.1978.117995},
     mrnumber = {512234},
     zbl = {0397.34048},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1978.117995/}
}