@article{ARM_1994_30_1_a0,
     author = {Pinda, \v{L}udov{\'\i}t},
     title = {On a fourth order periodic boundary value problem},
     journal = {Archivum mathematicum},
     pages = {1--8},
     year = {1994},
     volume = {30},
     number = {1},
     mrnumber = {1282107},
     zbl = {0808.34020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1994_30_1_a0/}
}