http://www.ics.uci.edu/~kobsa/papers/1993-aui-kobsa.pdf
http://74.125.47.132/search?q=cache:iygNBstGmj8J:www.cc.gatech.edu/computing/classes/cs8113d_94_fall/ps-files/Grueninger.ps.Z+Contributions+of+a+Social+Science+Based+Evaluation+for+Adaptive+Design+Projects.&hl=en&ct=clnk&cd=1&gl=us&client=firefox-a