Herman Haupt
- Description of an iron arched bridge of 133 feet span, across the canal on section 5 of the Pennsylvania central railroad. In: Journal of The Franklin Institute, v. 48, n. 3 (September 1849), S. 181-184. (1849):
- General theory of bridge construction. D. Appleton and Company, New York (USA), S. 268. (1888):