1. AASHTO (American Association of State Highway and Transportation Officials), 2014. AASHTO LRFD bridge design specifications. 7th ed. AASHTO, Washington, DC.
2. ACPA (American Concrete Pipe Association), 1993. Concrete technology handbook: a presentation of historical and current state-of-the-art design and installation methodology. ACPA, Irving, TX.
3. Banacos, P. C., 2011. Box and whisker plots for local climate datasets: interpretations and creation using excel 2007/2010. Eastern Region Technical Attachment. NOAA/NWS Burlington, Vermont.
4. Vertical loads on concrete box culverts under high embankments. J. Bridge Eng., Am. Soc;Bennett;Civ. Eng.,2005
5. Boscardin, M.D., Selig, E.T., Lin, R.S., Yang, G.R., 1990. Hyperbolic parameters for compacted soils. J. Geotech. Eng. Am. Soc. Civ. Eng., 116(1), 88-104.