P. J. Ortoleva. The multifaceted family of the nonlinear: Waves and fields, center dynamics, catastrophes, rock bands and precipitation patterns. In Synergetics: Far from equilibrium: Proceedings of the Conference Far from Equilibrium, Instabilities and Structures, Bordeaux, France, September 27-29, 1978, edited by A. Pacault and C. Vidal, 114-127. New York: Springer-Verlag (1979).