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3. CEN. Eurocode 2 (1992). Design of concrete structures – Part 1-1: general rules and rules for buildings. ENV 1992-1-1:1992.
4. CEN. Eurocode 2 (2004). Design of concrete structures – Part 1-1: general rules and rules for buildings. EN 1992-1-1: 2004:E.
5. Joint ACI-ASCE Committee 423 (2000). State-of-the-art report on partially prestressed concrete (ACI 423.5R-99). Farmington Hills, MI, USA, American Concrete Institute.