1Park, R. and Gamble, W. L., Reinforced Concrete Slabs,John Wiley and Sons, 1980,pp:562- 565.
2Ockleston,A.J.,"Load Tests on a Three Story Reinforced Concrete Building in Johannesburg,"Structural Engineer(London), V. 33, No. 10, Oct. 1955, pp: 304- 322.