@article{05847802, title = {Extremal values of half-eigenvalues for }, journal = {Boundary Value Problems [electronic only]}, volume = {2010}, year = {2010}, doi = {10.1155/2010/690342}, zbl = {1207.35172}, language = {en}, url = {http://dml.mathdoc.fr/item/05847802} }
Yan, Ping. Extremal values of half-eigenvalues for . Boundary Value Problems [electronic only], Tome 2010 (2010) . doi : 10.1155/2010/690342. http://gdmltest.u-ga.fr/item/05847802/