@article{1250128111,
author = {Kelley, Walter G.},
title = {Boundary value problems for pairs of second order equations containing a small parameter},
journal = {Rocky Mountain J. Math.},
volume = {12},
number = {4},
year = {1982},
pages = { 655-668},
language = {en},
url = {http://dml.mathdoc.fr/item/1250128111}
}
Kelley, Walter G. Boundary value problems for pairs of second order equations containing a small parameter. Rocky Mountain J. Math., Tome 12 (1982) no. 4, pp. 655-668. http://gdmltest.u-ga.fr/item/1250128111/