@article{10_1090_S0894_0347_1988_0928264_9,
     author = {Dahlberg, Bj\~A{\textparagraph}rn E. J. and Kenig, Carlos E.},
     title = {Nonnegative solutions of the {initial-Dirichlet} problem for generalized porous medium equations in cylinders},
     journal = {Journal of the American Mathematical Society},
     pages = {401--412},
     publisher = {mathdoc},
     volume = {01},
     number = {2},
     year = {1988},
     doi = {10.1090/S0894-0347-1988-0928264-9},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1988-0928264-9/}
}