- RITTER, M.A. Timber bridges: Design, Construction, Inspection and Maintenance – Part 2, Honolulu Hawaii: University Press of the Pacific, 2005, s 453, ISBN: 1-4102-2191-X .
- RITTER, M.A. Timber bridges: Design, Construction, Inspection and Maintenance – Part 2. Honolulu Hawaii: University Press of the Pacific, 2005. ISBN 1-4102-2192-X.