1. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-99) and Commentary (ACI 318 R-99), American Concrete Institute, Farmington Hills, Michigan, USA, 1999.
2. Standards New Zealand, NZS 3101: The Design of Concrete Structures: Concrete Structures Standard: Part 1: Code of Practice and Part 2: Commentary, Standards New Zealand, Wellington, New Zealand, 1995.
3. British Standards Institution, BS8110: Part 1: 1997: Structural Use of Concrete: Part 1: Code of Practice for Design and Construction, British Standards Institution, London, UK, 1997.