@article{120255, author = {Vladim\'\i r Vl\v cek}, title = {Periodic solutions of a parametric nonlinear third-order differential equation}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {30}, year = {1991}, pages = {159-188}, zbl = {0777.34031}, mrnumber = {1166435}, language = {en}, url = {http://dml.mathdoc.fr/item/120255} }
Vlček, Vladimír. Periodic solutions of a parametric nonlinear third-order differential equation. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 30 (1991) pp. 159-188. http://gdmltest.u-ga.fr/item/120255/
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