Jennifer C. Lai Stella Mitchell Marisa S. Viveros David Wood Kwan Min Lee Ubiquitous Access to Unified Messaging: A Study of Usability and the Use of Pervasive Computing. 385-404 2002 14 Int. J. Hum. Comput. Interaction 3-4 http://dx.doi.org/10.1207/S15327590IJHC143&4_07 db/journals/ijhci/ijhci14.html#LaiMVWL02