7Mc Dermott, J H Larkin. Re-representing textbook physics problems. [A]. Proceedings of the 2nd National Conference of the Canadian Society for Computational Studies of Intelligence[C]. Toronto: University of Toronto Press , 1978. 156--164.
9T L Spalding, G L Murphy. Effects of Background Knowledge on Category Construction [J]. Journal of Experimental Psychology & Learning , Memory , and Cognition , 1996, (22): 525 538.
