1. A method for calculating performance times for users of interactive computing systems;Card,1979
2. The Nature of Explanation;Craik,1943
3. Seeing the works: A strategy for teaching interactive programming;Du Boulay,1978
4. The black box inside the glass box: presenting computing concepts to novices;Du Boulay;International Journal of Man-Machine Studies,1981
5. Advanced calculator logic HP RPN/Algebraic;Hewlett-Packard,1979