@article{AUPO_1981__20_1_a12,
     author = {Vl\v{c}ek, Vladim{\'\i}r},
     title = {On a certain boundary value problem for a fourth-order iterated differential equation},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {117--127},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1981},
     mrnumber = {0645894},
     zbl = {0486.34012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1981__20_1_a12/}
}