1. NTCC-2004. Normas Técnicas Complementarias para Diseño y Construcción de Estructuras de Concreto” Gaceta Oficial del Distrito Federal. México, October; 2004 [in Spanish].
2. ACI-318-11. Building code requirements for structural concrete (ACI-318-11) and commentary (ACI 318R-11). American Concrete Institute, Farmington Hills, Michigan, USA; 2011.
3. DIN 1045-1. Concrete, reinforcement and prestressed concrete structures, part 1: design. Deutsches Institut für Normung e.V.; 2001.
4. Park R, Paulay T. Estructuras de concreto reforzado, ninth printing of the first edition. Limusa, México; 1997. p. 279–84, 691–2 [in Spanish].
5. Reinforced concrete: mechanics and design;MacGregor,1997