Fahmi, Hani M., and Zubaidah A. Al-Bayati. “NONLINEAR FINITE ELEMENT ANALYSIS OF PRESTRESSED CONCRETE MEMBERS”. Nahrain University College of Engineering Journal, vol. 11, no. 2, Mar. 2008, pp. 194-01, https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/514.