Belkin, Nicholas J. (2000). "The human elements: Helping people find what they don’t know." Communications of the ACM 43(8), 58-61. Daniels, P. J. (1986). "Cognitive models in information retrieval: An evaluative review." Journal of Documentation 42(4), 272-304. Rich, Elaine A. (1983). "Users are individuals: individualising user models." International Journal of Man - Machine Studies 18, 199-214. Luz M. Quiroga, Martha E. Crosby & Marie K. Iding (2004) "Reducing Cognitive Load". In: Proceedings of the 37th Hawaii International Conference on System Sciences. PDF file available at IEEE website, http://csdl.computer.org/comp/proceedings/hicss/2004/2056/05/205650131aabs.htm