@article{03640049, title = {On slow oscillation and nonoscillation in retarded equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2}, year = {1979}, pages = {523-530}, doi = {10.1155/S0161171279000417}, zbl = {0412.34018}, language = {en}, url = {http://dml.mathdoc.fr/item/03640049} }
Singh, Bhagat. On slow oscillation and nonoscillation in retarded equations.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 523-530. doi : 10.1155/S0161171279000417. http://gdmltest.u-ga.fr/item/03640049/