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@article{CMUC_1973__14_1_a10, author = {Petry, Walter}, title = {Nonlinear eigenvalue problems}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {113--126}, publisher = {mathdoc}, volume = {14}, number = {1}, year = {1973}, mrnumber = {0320831}, zbl = {0255.35041}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_1_a10/} }
Petry, Walter. Nonlinear eigenvalue problems. Commentationes Mathematicae Universitatis Carolinae, Tome 14 (1973) no. 1, pp. 113-126. http://geodesic.mathdoc.fr/item/CMUC_1973__14_1_a10/