@article{02033408,
title = {A higher order approximation to a singular perturbation problem.},
journal = {Novi Sad Journal of Mathematics},
volume = {28},
year = {1998},
pages = {19-31},
zbl = {1029.65505},
language = {en},
url = {http://dml.mathdoc.fr/item/02033408}
}
Uzelac, Zorica; Surla, Katarina. A higher order approximation to a singular perturbation problem.. Novi Sad Journal of Mathematics, Tome 28 (1998) pp. 19-31. http://gdmltest.u-ga.fr/item/02033408/