L'Autore dimostra che sotto opportune condizioni tutte le soluzioni dell'equazione non lineare del quarto ordine sono oscillatorie.
@article{RLINA_1975_8_58_4_531_0, author = {David Lowell Lovelady}, title = {An oscillation criterion for a fourth order integrally superlinear differential equation}, journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti}, volume = {59}, year = {1975}, pages = {531-536}, zbl = {0348.34026}, mrnumber = {0422766}, language = {en}, url = {http://dml.mathdoc.fr/item/RLINA_1975_8_58_4_531_0} }
Lovelady, David Lowell. An oscillation criterion for a fourth order integrally superlinear differential equation. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti, Tome 59 (1975) pp. 531-536. http://gdmltest.u-ga.fr/item/RLINA_1975_8_58_4_531_0/
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