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Carroll, J. M. (1982). The Adventure of Getting to Know a Computer. In R. M. Baecker, & W. A. S. Buxton (Eds.), Human-Computer Interaction: A Multidisciplinary Approach (pp. 639–648). Toronto: Morgan Kaufmann Publishers, Inc. |
Frey, B., & Oberholzer-Gee, F. (1997). The Cost of Price Incentives: An Empirical Analysis of Motivation Crowding- Out. The Cost of Price Incentives, 87(4), 746–755. |