@article{03669085,
title = {Singular perturbation for nonlinear boundary-value problems.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2},
year = {1979},
pages = {61-68},
doi = {10.1155/S0161171279000065},
zbl = {0429.34051},
language = {en},
url = {http://dml.mathdoc.fr/item/03669085}
}
Ling, Rina. Singular perturbation for nonlinear boundary-value problems.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 61-68. doi : 10.1155/S0161171279000065. http://gdmltest.u-ga.fr/item/03669085/