Keil, A., Goldack, A., LInden, S., Sander, C., & McKenna, C. (2013). Pedestrian bridges: Ramps, walkways, structures. Edition Detail.

Keil, Andreas, Arndt Goldack, Sebastian LInden, Christiane Sander, and Christina McKenna. Pedestrian Bridges: Ramps, Walkways, Structures. Munich: Edition Detail, 2013.

Keil, Andreas, et al. Pedestrian Bridges: Ramps, Walkways, Structures. Edition Detail, 2013.