1. AASHTO LRFD: Bridge Design Specification, (8th Ed.). Washington D.C.: American Association of State Highway and Transportation Officials; 2017.
2. ACI (American Concrete Institute) Committee 318. Building code requirements for structural concrete (ACI318-14) and commentary (ACI 318R-1). Farmington Hills MI: ACI; 2014.
3. Reliability-based design of reinforced concrete columns;Mirza;J Struct Safety,1996
4. Life-cycle performance of civil structure and infrastructure systems: survey;Biondini;J Struct Eng,2018
5. Concrete price: http://paragonreadymix.com/CustomerTools.aspx.