@article{01154626,
title = {Asymptotic solutions for mixed-type equations with a small deviation.},
journal = {Georgian Mathematical Journal},
volume = {5},
year = {1998},
pages = {107-120},
doi = {10.1007/BF02767991},
zbl = {0903.34066},
language = {en},
url = {http://dml.mathdoc.fr/item/01154626}
}
Hou, Zhanyuan; Cassell, J.S. Asymptotic solutions for mixed-type equations with a small deviation.. Georgian Mathematical Journal, Tome 5 (1998) pp. 107-120. doi : 10.1007/BF02767991. http://gdmltest.u-ga.fr/item/01154626/