Gandomi, A.H., Faramarzifar, A., Ghanad Rezaee, P., Asghari, A. and Talatahari, S. 2015. New design equations for elastic modulus of concrete using multi expression programming. Journal of Civil Engineering and Management. 21, 6 (Jun. 2015), 761-774. DOI:https://doi.org/10.3846/13923730.2014.893910.