Pons-Valladares, O., J. M. González-Barroso, R. López-Olivares, and I. Arias. “Educational Project to Improve Problem-Based Learning in Architectural Construction Courses Using Active and Co-Operative Techniques”. Revista De La Construcción. Journal of Construction, vol. 14, no. 2, Aug. 2015, pp. 35-43, http://146.155.94.136/index.php/RDLC/article/view/13308.