@article{04142519, title = {On stability and boundedness of solutions of a certain fourth-order delay differential equation.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {12}, year = {1989}, pages = {589-602}, doi = {10.1155/S0161171289000724}, zbl = {0697.34063}, language = {en}, url = {http://dml.mathdoc.fr/item/04142519} }
Okoronkwo, Emmanuel O. On stability and boundedness of solutions of a certain fourth-order delay differential equation.. International Journal of Mathematics and Mathematical Sciences, Tome 12 (1989) pp. 589-602. doi : 10.1155/S0161171289000724. http://gdmltest.u-ga.fr/item/04142519/