1. The Alternate Reality Kit; an animated environment for creating interactive simulations;Smith,1986
2. Discovering physics with microcomputers;Every;Comput. Educ.,1984
3. Smalltalk-80: The Language and its Implementation;Goldberg,1983
4. What makes computer games fun?;Malone,1980
5. Graphics and animation in teaching dialogues;Every;Open University C.A.L. Group Technical Report No. 14,1982