Institute of Mathematics and Its Applications & Griffiths, J. D. (1992). Mathematics in transport planning and control: Based on the proceedings of a conference on mathematics in transport planning and control, organized by the Institute of Mathematics and Its Applications and held at the University of Wales College of Cardiff in September 1989. Clarendon Press Oxford University Press.

Institute of Mathematics and Its Applications and J. D. Griffiths. Mathematics in Transport Planning and Control: Based on the Proceedings of a Conference on Mathematics in Transport Planning and Control, Organized by the Institute of Mathematics and Its Applications and Held at the University of Wales College of Cardiff in September 1989. Oxford, New York: Clarendon Press Oxford University Press, 1992.

Institute of Mathematics and Its Applications and J. D. Griffiths. Mathematics in Transport Planning and Control: Based on the Proceedings of a Conference on Mathematics in Transport Planning and Control, Organized by the Institute of Mathematics and Its Applications and Held at the University of Wales College of Cardiff in September 1989. Clarendon Press Oxford University Press, 1992.