@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/