1. Spacers for Reinforced Concrete. Standard Provisions for Achieving Cover Encircling Reinforcing Steel;Concrete Society Report CS 101,1989
2. CIRIA C568: Specifying, Detailing and Achieving Cover to Reinforcement;King,2001
3. Cover to reinforcement: getting it right;Shaw;Struct. Eng.,2007
4. Concrete Advice No. 43: Spacers and Visual Concrete;Barnes,2012
5. Placing Reinforcing Bars: Recommended Practices;CRSI,2011