@article{MZ_1991__208_3_174305,
     author = {W. Walter and R.C. Thompson},
     title = {A qualitative study on a parabolic free boundary problem.},
     journal = {Mathematische Zeitschrift},
     pages = {127--138},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1991},
     zbl = {0738.35102},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174305/}
}