(Muller et al. 1995) -  Muller, Michael J, Anne McClard, Brigham Bell, Scott Dooley, Lori Meiskey, Judith A Meskill, Randall Sparks, and Donna Tellam.  "Validating an Extension to Participatory Heuristic Evaluation: Quality of Work and Quality of Work Life." In Conference companion on Human factors in computing systems. ACM, 115-16, 1995.

(Nielsen 1992) - Nielsen, Jakob.  "Finding Usability Problems through Heuristic Evaluation." In Conference companion, 373-80. New York, New York, USA: ACM Press, 1992.

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