@article{ARM_1978_14_3_a6,
     author = {\v{S}olt\'es, Pavel},
     title = {Oscillation of solutions of a non-linear delay differential equation of the fourth order},
     journal = {Archivum mathematicum},
     pages = {175--180},
     year = {1978},
     volume = {14},
     number = {3},
     mrnumber = {512757},
     zbl = {0425.34072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1978_14_3_a6/}
}