@article{MASLO_1979_29_1_a0,
     author = {Regenda, J\'an},
     title = {Oscillation criteria for fourth-order linear differential equations},
     journal = {Mathematica slovaca},
     pages = {3--16},
     year = {1979},
     volume = {29},
     number = {1},
     mrnumber = {561771},
     zbl = {0408.34032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1979_29_1_a0/}
}