1. Hillerborg, A., Modeer, M., Petersson, P.E. (1976), “Analysis of Crack Formation and Crack Growth in Concrete by Means of Fracture Mechanics and Finite Elements”, Cement and Concrete Research, Vol 6, pp. 773–782.
2. Modeer, M. (1979), “A Fracture Mechanics Approach to Failure Analyses of Concrete Materials”, Report TVBM-1001, Div. of Building Materials, Lund Inst. of Techn., Sweden.
3. Petersson, P.E. (1981), “Crack Growth and Development of Fracture Zones in Plain Concrete and Similar Materials”, Report TVBM-1006, Div. of Building Materials, Lund Inst. of Techn., Sweden.
4. Brennan, G. (1978), “A Test to Determine the Bending Moment Resistance of Rigid Pipes”. Supplementary Report 348, Earthworks and Underground Pipes Division, Transport and Road Research Laboratory Crowthorne, Berkshire, England.
5. Hedman, O., Losberg, A. (1978), “Design of Concrete Structures with Regard to Shear Forces”, CEB Bulletin d’Information No 126: Shear and Torsion, pp. 183–210.