@article{ARM_1980__16_4_a4,
     author = {Ol\'ah, Rudolf},
     title = {Note on the oscillation of linear delay differential equations},
     journal = {Archivum mathematicum},
     pages = {213--216},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {1980},
     mrnumber = {594468},
     zbl = {0447.34065},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1980__16_4_a4/}
}