2) RILEM Draft Recommendation (50-FMC): Determination of the Fracture Energy of Mortar and Concrete by Means of Three-point Bend Tests on Notched Beams. Materials and Structures, Vol. 18, No. 93, pp. 285-290, 1983.
3) Petersson, P. E.: Crack Growth and Development of Fracture Zone in Plain Concrete and Similar Materials, Report TVBM-1001, Division of Building Materials, Lund Institute of Technology, Sweden, 1981.
4) Wittmann, F. H., Rokugo, K., Bruhwiler, E., Mihashi, H. and Simonin, P.: Fracture Energy and Strain Softening of Concrete as Determined by means of Compact Tension Specimens, Materials and Structures, Vol. 21, No. 121, pp. 21-32, 1988.
5) Hu, X. Z. and Wittmann, F. H.: Fracture Process Zone and Kr-curve of Hardened Cement Paste and Mortar, Fracture of Concrete and Rock, Elsevier Applied Science, pp. 307-316, 1989.