P. J. Ortoleva. From nonlinear waves to spiral and speckle patterns: Nonequilibrium phenomena in geological and biological systems. Physica 12D:305-320 [Reprinted in Fronts, interfaces and patterns: Proceedings of the Third Annual International Conference of the Center for Nonlinear Studies, Los Alamos, New Mexico 87545, USA, May 2-6, 1983, 1984, edited by Alan R. Bishop, Laurence J. Campbell, and Paul J. Channel, 305-320. New York: North-Holland Physics Publishing.] (1984).