1. J.D. Murray, Mathematical Biology (Springer Verlag, New York, 1993)
2. N.F. Britton, Reaction-Diffusion Equations and Their Applications to Biology (Academic Press, London, 1986)
3. K. Showalter, Nonlinear Science Today 4, 1 (1995)
4. Ya. B. Zeldovich, S.B. Pikelner, Soviet Physics JETP 29, 170 (1969)
5. S. Munier, R. Peschanski, Phys. Rev. Lett. 91, 232001 (2003)