1. Sublinear elliptic equations in $\mathbbR^n,$;H. Brezis;Manuscripta Math.,1992
2. Rate of approach to a singular steady state in quasilinear reaction-diffusion equations,;J. W. Dold;(English summary) Ann. Scuola Norm. Sup. Pisa Cl. Sci,1998
3. "Degenerate Parabolic Equations,'';E. DiBenedetto;Springer-Verlag,1993
4. The Cauchy problem for the non-linear filtration equation in an inhomogeneous medium,;D. Eidus;J. Diff. Eqns.,1990
5. The filtration equation in a class of functions decreasing at infinity,;D. Eidus;Proc. Amer. Math. Soc.,1994