@article{GDZPPN002198134,
title = {Singular perturbation of differential integral equations describing biased random walks.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {329},
year = {1981},
pages = {15-41},
zbl = {0437.60059},
url = {http://dml.mathdoc.fr/item/GDZPPN002198134}
}
Alt, Wolfgang. Singular perturbation of differential integral equations describing biased random walks.. Journal für die reine und angewandte Mathematik, Tome 329 (1981) pp. 15-41. http://gdmltest.u-ga.fr/item/GDZPPN002198134/