@article{1206136781, author = {Yoshida, Norio}, title = {Nonoscillation criteria for fourth order elliptic equations}, journal = {Hiroshima Math. J.}, volume = {5}, number = {3}, year = {1975}, pages = { 23-31}, language = {en}, url = {http://dml.mathdoc.fr/item/1206136781} }
Yoshida, Norio. Nonoscillation criteria for fourth order elliptic equations. Hiroshima Math. J., Tome 5 (1975) no. 3, pp. 23-31. http://gdmltest.u-ga.fr/item/1206136781/