C. Koch, and J. Gobell. Behavior research methods, instruments, & computers : a journal of the Psychonomic Society, Inc, 31 (1):
7-13(February 1999)4121<m:linebreak></m:linebreak>LR: 20001218; PUBM: Print; JID: 8413015; ppublish;<m:linebreak></m:linebreak>Formació.
E. Dashofy, A. van der Hoek, and R. Taylor. Proceedings of the 24rd International Conference on Software Engineering, 2002. ICSE 2002, page 266--276. IEEE, (May 2002)
K. Nielsen, R. Gude, M. Petersen, and K. Grønbæk. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)