Favini, Angelo Su un problema ai limiti per certe equazioni astratte del secondo ordine. (Italian) Zbl 0326.34070 Rend. Sem. Mat. Univ. Padova 53(1975), 211-230 (1976). MSC: 34G99 34B05 35L20 × Cite Format Result Cite Review PDF Full Text: Numdam EuDML
Thompson, Russell C. Differential inequalities for infinite second order systems and an application to the method of lines. (English) Zbl 0293.34024 J. Differ. Equations 17, 421-434 (1975). MSC: 34A40 34A35 34B15 65M20 × Cite Format Result Cite Review PDF Full Text: DOI