@article{ASNSP_1978_4_5_1_15_0, author = {Ambrosetti, Antonio and Mancini, Giovanni}, title = {Theorems of existence and multiplicity for nonlinear elliptic problems with noninvertible linear part}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 5}, number = {1}, year = {1978}, pages = {15-28}, zbl = {0375.35024}, mrnumber = {487001}, language = {en}, url = {http://www.numdam.org/item/ASNSP_1978_4_5_1_15_0} }
Ambrosetti, Antonio; Mancini, Giovanni. Theorems of existence and multiplicity for nonlinear elliptic problems with noninvertible linear part. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Serie 4, Volume 5 (1978) no. 1, pp. 15-28. http://www.numdam.org/item/ASNSP_1978_4_5_1_15_0/
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