Nonvisually Guided Locomotion to a Previously Viewed Target in Real and Virtual Environments. - Bob G. Witmer; Wallace J. Sadowski (Hum. Factors, 1998)

VE-Based Training Strategies for Acquiring Survey Knowledge. - Bob G. Witmer; Wallace J. Sadowski; Neal M. Finkelstein (Presence Teleoperators Virtual Environ., 2002)