1. J.E. Grey, A.P. Devereaux, W.N. Parker, Apparatus for making wrought metal T’s, US Patent 2,203,868 June (1939).
2. E.A. Davis, Yield and fracture of medium-carbon steel under combined stress, J. Appl. Mech. (March 1945) A13–A24.
3. J.H. Faupel, Yield and bursting characteristics of heavy wall cylinders, Trans. ASME ( July 1956).
4. B. Crossland, S.M. Jorgensen, J.A. Bones, The strength of thick-walled cylinders, ASME J. Eng. Ind. (May 1959).
5. H. Dietmann, The flow behavior of thick-walled cylinders under internal pressure, Bander Bleche Rohre 8 (3) (1967) 143–149 (in German).