References
- Wertheimer M. 1945 Productive Thinking New York Harper
- Bloom B. S. 1956 Taxonomy of Educational Objectives New York Longman
- Anderson L. W. Sosniak L. A. (eds) 1994 Bloom's Taxonomy: A Forty-year Retrospective Chicago University of Chicago Press
- Biggs J. B. Collis K. F. 1982 Evaluating the Quality of Learning: The SOLO Taxonomy (Structure of the Observed Learning Outcome) New York Academic Press
- Buxkemper , A. C. and Hartfiel , D. J. 1998 . Int. J. Math. Educ. Sci. Technol. , 29 : 464
- Poincaré H. 1929 The Foundations of Science New York The Science Press
- Wallas G. 1926 The Art of Thought New York Harcourt, Brace, and Co.