@article{CMJ_2002__52_4_a14,
     author = {Do\v{s}l\'y, Ond\v{r}ej and Osi\v{c}ka, Jan},
     title = {Oscillation and nonoscillation of higher order self-adjoint differential equations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {833--849},
     publisher = {mathdoc},
     volume = {52},
     number = {4},
     year = {2002},
     mrnumber = {1940063},
     zbl = {1023.34028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2002__52_4_a14/}
}