@article{120192, author = {Stan\v ek, Svatoslav}, title = {On oscillations of solutions and their derivatives in a nonlinear third-order differential equation}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {27}, year = {1988}, pages = {185-200}, zbl = {0711.34040}, mrnumber = {1039889}, language = {en}, url = {http://dml.mathdoc.fr/item/120192} }
Staněk, Svatoslav. On oscillations of solutions and their derivatives in a nonlinear third-order differential equation. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 27 (1988) pp. 185-200. http://gdmltest.u-ga.fr/item/120192/
Bounds for solutions of a nonlinear differential equations of the third order, Acta Univ. Palackianae Olomucensis, Fac. rerum nat., Math. XXVI, Vol. 88, 1987. (1987) | MR 1033330