@article{EJDE_2002__2002__a258,
     author = {Beno{\^\i}t,  Eric and El Hamidi,  Abdallah and Fruchard,  Augustin},
     title = {On combined asymptotic expansions in singular perturbations},
     journal = {Electronic journal of differential equations},
     year = {2002},
     volume = {2002},
     zbl = {1013.34058},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a258/}
}