Woodruff, Shawn; Billington, David P. (2007), "Aesthetics and economy in pedestrian bridge design", International Journal of Space Structures, 22 (1): 81–89, doi:10.1260/026635107781037310, S2CID110630511.
Woodruff, Shawn; Billington, David P. (2007), "Aesthetics and economy in pedestrian bridge design", International Journal of Space Structures, 22 (1): 81–89, doi:10.1260/026635107781037310, S2CID110630511.