1. ATKINSON, R. C., & WILSON, H. A.Computer-assisted instruction: A book of readings. New York: Academic Press, 1969.
2. CHURCHILL, S., NAESS, L., & OLIVIER, W. P. CAN-4, an advanced author language for CAI, computer-based testing and psychological experimentation: PDP-9 implementation. Behavior Research Methods & Instrumentation, 1971, 3, 95–99.
3. DURELL. A. B. Teaching concept acquisition strategies for mathematics. Unpublished MA thesis, University of Toronto, 1971.
4. ENSOR, D. A. A time-sharing system for the PDP9. Paper given at DECUS 1969 fall symposium.
5. GREEN, B. F., JR.Digital computers in research: An introduction for behavior and social scientists. New York: McGraw-Hill, 1963.