J. He, Z. Qi, W. Hang, C. Zhao, and M. King, “Predicting Freeway Pavement Construction Cost Using a Back-Propagation Neural Network: a Case Study in Henan, China”, BJRBE, vol. 9, no. 1, pp. 66–76, Mar. 2014, doi: 10.3846/bjrbe.2014.09.