E. Arriagada, R., and L. F. Ararcón C. “Quantification of Productivity Changes Due to Work Schedule Changes in Construction Projects. A Case Study”. Revista De La Construcción. Journal of Construction, vol. 13, no. 1, Apr. 2014, pp. 09-14, https://ojs.uc.cl/index.php/RDLC/article/view/13566.