com/1988/05/08/magazine/national-gridlock.html 2010年9月26日閲覧。 ^ Letton, Winsor (1971年). “Engineering in the Ocean Environment: A Method for Reducing Gridlock”
D. C.; Ledogar, Justin A.; Wroe, Stephen; Gutzler, Benjamin C.; Watson, Winsor H.; Paterson, John R. (2018-10-24). “Computational biomechanical analyses