Con opportune ipotesi su p(x) si studia il comportamento asintotico degli integrali dell'equazione e della sua equazione aggiunta.
@article{RLINA_1975_8_58_6_851_0, author = {Willie E. Taylor}, title = {On the solutions of certainnon-self-adjoint differential equations of fourth order}, journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti}, volume = {59}, year = {1975}, pages = {851-860}, zbl = {0395.34033}, mrnumber = {0437854}, language = {en}, url = {http://dml.mathdoc.fr/item/RLINA_1975_8_58_6_851_0} }
Taylor, Willie E. On the solutions of certainnon-self-adjoint differential equations of fourth order. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti, Tome 59 (1975) pp. 851-860. http://gdmltest.u-ga.fr/item/RLINA_1975_8_58_6_851_0/
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