@article{GDZPPN00242195X,
title = {An Improved Boundary Layer Estimate for a Singularly Perturbed Initial Value Problem.},
journal = {Mathematische Zeitschrift},
volume = {166},
year = {1979},
pages = {135-142},
zbl = {0378.34003},
url = {http://dml.mathdoc.fr/item/GDZPPN00242195X}
}
Howes, Frederick A. An Improved Boundary Layer Estimate for a Singularly Perturbed Initial Value Problem.. Mathematische Zeitschrift, Tome 166 (1979) pp. 135-142. http://gdmltest.u-ga.fr/item/GDZPPN00242195X/