1. AASHTO. 2014. LRFD bridge design specifications. 7th ed. Washington, DC: AASHTO.
2. Evaluation of rock property variability
3. Allen, T. M., A. S. Nowak, and R. J. Bathurst. 2005. Calibration to determine load and resistance factors for geotechnical and structural design. Transportation research circular E-C079. Washington, DC: Transportation Research Board of the National Academies.
4. ASCE. 2019. Future world vision: Infrastructure reimagined. Reston, VA: ASCE.
5. Atkinson J. 2008. “Rules of thumb in geotechnical engineering.” In Proc. 18th NZGS Geotechnical Symp. on Soil-Structure Interaction. Wellington New Zealand: New Zealand Geotechnical Society.