Chris J. Price Louise Travé-Massuyès Robert Milne Liliana Ironi Kenneth D. Forbus Bert Bredeweg M. H. Lee Peter Struss N. A. Snooke P. Lucas Marc Cavazza George Macleod Coghill Qualitative futures. 317-334 2006 21 Knowledge Eng. Review 4 http://dx.doi.org/10.1017/S026988890600097X db/journals/ker/ker21.html#PriceTMIFBLSSLCC06