@article{GDZPPN002225387,
title = {Asymptotic Expansions of the Pressure and the Free Boundary for Flows through Porous Media.},
journal = {Manuscripta mathematica},
volume = {43},
year = {1983},
pages = {131-154},
zbl = {0523.76081},
url = {http://dml.mathdoc.fr/item/GDZPPN002225387}
}
Kröner, Dietmar. Asymptotic Expansions of the Pressure and the Free Boundary for Flows through Porous Media.. Manuscripta mathematica, Tome 43 (1983) pp. 131-154. http://gdmltest.u-ga.fr/item/GDZPPN002225387/