Thomas K. Landauer, Daniel W. Nachbar. Selection from alphabetic and numeric menu trees using a touch screen: breadth, depth, and width. In Lorraine Borman, Raoul N. Smith, editors, Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, CHI 1985, San Francisco, California, USA, 1985. pages 73-78, ACM, 1985. [doi]
Abstract is missing.