Khalfallah, S., A. . Charif, and M. . Naimi. “Nonlinear Analysis of Reinforced Concrete Structures Using a New Constitutive Model”. European Journal of Computational Mechanics, vol. 13, no. 8, Sept. 2004, pp. 841-56, https://journals.riverpublishers.com/index.php/EJCM/article/view/2275.