@article{MM2_1983__44_154964,
     author = {Dietmar Kr\"oner},
     title = {Asymptotic {Expansions} of the {Pressure} and the {Free} {Boundary} for {Flows} through {Porous} {Media.}},
     journal = {Manuscripta mathematica},
     pages = {131--154},
     publisher = {mathdoc},
     volume = {44},
     year = {1983},
     zbl = {0523.76081},
     url = {http://geodesic.mathdoc.fr/item/MM2_1983__44_154964/}
}