@article{01283582,
title = {Nonlinear singularly perturbed systems of differential equations: A survey.},
journal = {Mathematical Problems in Engineering},
volume = {1},
year = {1995},
pages = {275-301},
doi = {10.1155/S1024123X95000172},
zbl = {0921.34055},
language = {en},
url = {http://dml.mathdoc.fr/item/01283582}
}
Slavova, Angela. Nonlinear singularly perturbed systems of differential equations: A survey.. Mathematical Problems in Engineering, Tome 1 (1995) pp. 275-301. doi : 10.1155/S1024123X95000172. http://gdmltest.u-ga.fr/item/01283582/