@article{104839, author = {J\'an Fut\'ak}, title = {Oscillation of solutions of a non-linear delay differential equation of the fourth order}, journal = {Archivum Mathematicum}, volume = {011}, year = {1975}, pages = {25-29}, zbl = {0341.34063}, mrnumber = {0412560}, language = {en}, url = {http://dml.mathdoc.fr/item/104839} }
Futák, Ján. Oscillation of solutions of a non-linear delay differential equation of the fourth order. Archivum Mathematicum, Tome 011 (1975) pp. 25-29. http://gdmltest.u-ga.fr/item/104839/
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