, Bonet Senach, J.L.; Fernández Prada, M.A. “Analytical Approach for Failure Surface of RC Sections under Axial Load and Biaxial Bending”. Hormigón y Acero 52, no. 221 (January 5, 2001). Accessed May 18, 2024. http://hormigonyacero.com/index.php/ache/article/view/317.