@article{10_21136_CMJ_1984_101930,
     author = {Regenda, J\'an},
     title = {Oscillation theorems for a class of linear fourth order differential equations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {113--120},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1984},
     doi = {10.21136/CMJ.1984.101930},
     mrnumber = {731984},
     zbl = {0542.34030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101930/}
}