1. Richart FE, Brandtzaeg A, Brown RL. A study of the failure of concrete under combined compressive stresses. Bulletin 185, 1928, University of Illinois Engineering Experimental Station, Champaign, Ill
2. Richart FE, Brandtzaeg A, Brown RL. The failure of plain and spirally reinforced concrete in compression. Bulletin 190, 1929, University of Illinois Engineering Experimental Station, Champaign, Ill, 1928
3. Failure theories and design criteria for plain concrete;Newman,1969
4. Stress–strain curves of concrete confined by spiral reinforcement;Ahmad;ACI J.,1982
5. Complete triaxial stress–strain curves for concrete;Ahmad;J. Struct. Div., Proc. Am. Soc. Civ. Eng.,1982