Leah Reeves Jennifer C. Lai James A. Larson Sharon L. Oviatt T. S. Balaji Stéphanie Buisine Penny Collings Philip R. Cohen Ben Kraal Jean-Claude Martin Michael F. McTear T. V. Raman Kay M. Stanney Hui Su Qian Ying Wang Guidelines for multimodal user interface design. 57-59 2004 47 Commun. ACM 1 http://doi.acm.org/10.1145/962081.962106 db/journals/cacm/cacm47.html#ReevesLLOBBCCKMMRSSW04