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@article{MZ_1986__192_173730, author = {K. H\"ollig and H.-O. Kreiss}, title = {C?-Regularity for the {Porous} {Medium} {Equation.}}, journal = {Mathematische Zeitschrift}, pages = {217--224}, publisher = {mathdoc}, volume = {192}, year = {1986}, zbl = {0597.35107}, url = {http://geodesic.mathdoc.fr/item/MZ_1986__192_173730/} }
K. Höllig; H.-O. Kreiss. C?-Regularity for the Porous Medium Equation.. Mathematische Zeitschrift, Tome 192 (1986), pp. 217-224. http://geodesic.mathdoc.fr/item/MZ_1986__192_173730/