1. Burnett G. E. & Joyner S. M. (1996). An assessment of moving-map and symbol-based route guidance systems. To be published in Ergonomics of Intelligent Vehicle Highway Systems, Noy I. Y. (ed), Lawrence Erlbaum Associates Inc., New Jersey.
2. Ashby M. Fairclough S. H. & Parkes A. M. (1991). A comparison of two route information systems in an urban environment. CEC DRIVE I Project V1017 (BERTIE), Report no. 47, HUSAT Research Institute.