1. Aronson, D.G. The porous media equation. In Nonlinear Diffusion Problems. Lecture Notes in Mathematics, Vol. 1224. Springer-Verlag, New York, 1986.
2. Aronson, D.G. and J. Graveleau. A self-similar solution to the focusing problem for the porous media equation. European J. Appl. Math., 4 (1993), 65–81.
3. Aronson, D.G. and J.L. Vazquez. Calculation of anomalous exponents in nonlinear diffusion. Phys. Rev. Lett., 72 (1994), 348–351.
4. Aronson, D.G. and J.L. Vazquez. Anomalous exponents in nonlinear diffusion. J. Nonlinear Sci., 5 (1995), 29–56.
5. Barenblatt, G.I. Similarity, Self-Similarity, and Intermediate Asymptotics. Consultants Bureau, New York, 1979.