@article{GDZPPN002201313,
title = {Parabolic regularization and behaviour of the free boundary for unsaturated flow in a porous medium.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {346},
year = {1984},
pages = {180-196},
zbl = {0517.76095},
url = {http://dml.mathdoc.fr/item/GDZPPN002201313}
}
Kröner, Dietmar. Parabolic regularization and behaviour of the free boundary for unsaturated flow in a porous medium.. Journal für die reine und angewandte Mathematik, Tome 346 (1984) pp. 180-196. http://gdmltest.u-ga.fr/item/GDZPPN002201313/