@article{AUPO_1988_27_1_a16,
     author = {Vl\v{c}ek, Vladim{\'\i}r},
     title = {On the boundedness of solutions of a certain fourth-order nonlinear differential equation},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {273--288},
     year = {1988},
     volume = {27},
     number = {1},
     mrnumber = {1039895},
     zbl = {0719.34060},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1988_27_1_a16/}
}