@article{14a27d11af9e4c8599ca70609eaebd30,
title = "A free boundary problem connected with non-steady filtration in porous media",
keywords = "Non-steady filtration problems, bounds on the face boundary, finite difference approximations, stability and comparison theorems",
author = "Avner Friedman and Alessandro Torelli",
note = "Funding Information: This paper is partially supported Italy through L.A.N. of Pavia.",
year = "1977",
month = aug,
day = "8",
doi = "10.1016/0362-546X(77)90015-3",
language = "English",
volume = "1",
pages = "503--545",
journal = "Nonlinear Analysis",
issn = "0362-546X",
number = "5",
}