E. Rössler, Otto, and P. J. Ortoleva. Strange attractors in 3-variable reaction systems. In Lecture notes in biomathematics, No. 21: Theoretical approaches to complex systems: Proceedings, Tubingen, June 11-12, 1977, edited by R. Heim and G. Palm, 67-73. New York: Springer-Verlag (1978).
