GUTH, D. The Veering Tendency of Blind Pedestrians : An Analysis of the Problem and Literature Review. J. Visual Impairment and Blindness. 1994, Sep-Oct, 391-400
GUTH, D. Veering by Blind Pedestrian : Individual Differences and Their Implications for Instruction. J. Visual Impairment and Blindness. 1995, Jan-Feb, 28-37
OHKURA, M. Clues for Blind Travelers to Cross Intersections. Proceedings of the 6th International Mobility Conference, 1991, Madrid. 1991, Book I, 219-222