@article{01460664, title = {The first eigenvalue of a Riemann surface.}, journal = {Electronic Research Announcements of the American Mathematical Society [electronic only]}, volume = {5}, year = {1999}, pages = {76-81}, doi = {10.1090/S1079-6762-99-00064-5}, zbl = {0948.58003}, language = {en}, url = {http://dml.mathdoc.fr/item/01460664} }
Brooks, Robert; Makover, Eran. The first eigenvalue of a Riemann surface.. Electronic Research Announcements of the American Mathematical Society [electronic only], Tome 5 (1999) pp. 76-81. doi : 10.1090/S1079-6762-99-00064-5. http://gdmltest.u-ga.fr/item/01460664/