@article{00770115,
title = {Applications of the method of barriers. II: Some singularly perturbed problems.},
journal = {Georgian Mathematical Journal},
volume = {2},
year = {1995},
pages = {323-334},
doi = {10.1007/BF02261705},
zbl = {0833.34017},
language = {en},
url = {http://dml.mathdoc.fr/item/00770115}
}
Sushko, V.G.; Rozov, N.Kh. Applications of the method of barriers. II: Some singularly perturbed problems.. Georgian Mathematical Journal, Tome 2 (1995) pp. 323-334. doi : 10.1007/BF02261705. http://gdmltest.u-ga.fr/item/00770115/