Pupo Sintras, Nereyda, and Carlos A. Recarey Morfa. 2010. “Evaluation of Effect Flexotorsor at Talls Buildings With the Utilization of Method of Distribution of Horizontals Forces: Modified PPG”. Revista Ingeniería De Construcción 25 (1):95-120. https://ojs.uc.cl/index.php/ric/article/view/16577.