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@article{ARM_1973__9_3_a2, author = {\v{S}olt\'es, Pavel}, title = {A remark on the oscillatory behavior of solutions of differential equations of order 3 and 4}, journal = {Archivum mathematicum}, pages = {115--118}, publisher = {mathdoc}, volume = {09}, number = {3}, year = {1973}, mrnumber = {0350115}, zbl = {0318.34046}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1973__9_3_a2/} }
Šoltés, Pavel. A remark on the oscillatory behavior of solutions of differential equations of order 3 and 4. Archivum mathematicum, Tome 09 (1973) no. 3, pp. 115-118. http://geodesic.mathdoc.fr/item/ARM_1973__9_3_a2/