@article{1050348439, author = {Mart\'\i nez, Sandra and Rossi, Julio D.}, title = {Isolation and simplicity for the first eigenvalue of the $p$-Laplacian with a nonlinear boundary condition}, journal = {Abstr. Appl. Anal.}, volume = {7}, number = {12}, year = {2002}, pages = { 287-293}, language = {en}, url = {http://dml.mathdoc.fr/item/1050348439} }
Martínez, Sandra; Rossi, Julio D. Isolation and simplicity for the first eigenvalue of the $p$-Laplacian with a nonlinear boundary condition. Abstr. Appl. Anal., Tome 7 (2002) no. 12, pp. 287-293. http://gdmltest.u-ga.fr/item/1050348439/