@article{AUPO_1990__29_1_a10,
     author = {Vl\v{c}ek, Vladim{\'\i}r},
     title = {Note on existence of periodic solutions to the third-order nonlinear differential equation},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {165--195},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1990},
     mrnumber = {1144837},
     zbl = {0754.34038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1990__29_1_a10/}
}