@article{03857514, title = {Oscillation criteria for certain nonlinear fourth order equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {6}, year = {1983}, pages = {551-557}, doi = {10.1155/S0161171283000502}, zbl = {0539.34021}, language = {en}, url = {http://dml.mathdoc.fr/item/03857514} }
Taylor, W.E.jun. Oscillation criteria for certain nonlinear fourth order equations.. International Journal of Mathematics and Mathematical Sciences, Tome 6 (1983) pp. 551-557. doi : 10.1155/S0161171283000502. http://gdmltest.u-ga.fr/item/03857514/