Penichet, V. M. R.; Lozano, M. D.; Gallud, J. A.; Tesoriero, R.: User Interface Analysis for Groupware applications in the TOUCHE process model. International Journal of Advances in Engineering Software (J.AES). ISSN: 0965-9978,  vol. 40, pp. 1212-1222.

Link: http://dl.acm.org/citation.cfm?id=1596233