P. J. Ortoleva, J. Chadam, M. El-Badewi, R. Feeney, D. Feinn, S. Haase, R. Larter, E. Merino, A. Strickholm and S. Schmidt. Mechanisms of bio- and geo-pattern formation and chemical signal propagation. In Instabilities, bifurcations, and fluctuations in chemical systems, edited by L. E. Reichl and W. C. Schieve, 125-195. Austin: University of Texas Press (1982).