@article{05825766,
title = {Nonlocal four-point boundary value problem for the singularly perturbed semilinear differential equations.},
journal = {Boundary Value Problems [electronic only]},
volume = {2011},
year = {2011},
doi = {10.1155/2011/570493},
zbl = {1209.34018},
language = {en},
url = {http://dml.mathdoc.fr/item/05825766}
}
Vrabel, Robert. Nonlocal four-point boundary value problem for the singularly perturbed semilinear differential equations.. Boundary Value Problems [electronic only], Tome 2011 (2011) . doi : 10.1155/2011/570493. http://gdmltest.u-ga.fr/item/05825766/