1. Linear and Nonlinear Waves;Whitham,1974
2. Nonlinear Waves in One-dimensional Dispersive Systems;Bhatnagar,1979
3. On the role of inhomogeneity of excitable medium for the mechanisms of self-supporting activity;Zykov;Biofizika,1977
4. Instability and turbulence of wavefronts in reaction-diffusion systems;Kuramoto;Prog. Theor. Phys.,1980
5. A geometrical theory for spiral waves in excitable media;Keener;SIAM J. Appl. Math.,1986