author=  "A. ten Teije and F. van Harmelen and A. Th. Schreiber and B. J. Wielinga",
 title =   "Construction of problem-solving methods as parametric design",
 journal =  "International Journal of Human-Computer Studies, Special issue on problem-solving methods",
 year =  "1998",
volume =  "49",
number =   "4",
pages =  "xxx"}