Leach, P., & Steeb, W. (1988). Proceedings of the Workshop on Finite Dimensional Integrable Nonlinear Dynamical Systems: Johannesburg, South Africa, 11-15 January 1988. World Scientific.

Leach, P.G.L., and W.-H Steeb. Proceedings of the Workshop on Finite Dimensional Integrable Nonlinear Dynamical Systems: Johannesburg, South Africa, 11-15 January 1988. Singapore: World Scientific, 1988.

Leach, P.G.L., and W.-H Steeb. Proceedings of the Workshop on Finite Dimensional Integrable Nonlinear Dynamical Systems: Johannesburg, South Africa, 11-15 January 1988. World Scientific, 1988.