@article{01701622, title = {The method of averaging and functional differential equations with delay.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {497-511}, doi = {10.1155/S0161171201010407}, zbl = {0994.34054}, language = {en}, url = {http://dml.mathdoc.fr/item/01701622} }
Lakrib, Mustapha. The method of averaging and functional differential equations with delay.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 497-511. doi : 10.1155/S0161171201010407. http://gdmltest.u-ga.fr/item/01701622/