Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@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}, publisher = {mathdoc}, volume = {14}, number = {3}, year = {1978}, mrnumber = {512757}, zbl = {0425.34072}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1978__14_3_a6/} }
Šoltés, Pavel. Oscillation of solutions of a non-linear delay differential equation of the fourth order. Archivum mathematicum, Tome 14 (1978) no. 3, pp. 175-180. http://geodesic.mathdoc.fr/item/ARM_1978__14_3_a6/