4) Kani, G.N.J. : The Riddle of Shear Failure and Its Solution, Journal of the American Concrete Institute, No.61-28, pp.441-467, April 1964.
5) Leonhardt, F. and Walther, R. : Contribution to the Treatment of the Problems of Shear in Reinforced Concrete Construction, Translation No.111, Cement and Concrete Association, London, 1964.