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2. Heneger, C. H., Toughness Index of Fibre Concrete. In Testing and Test Methods of Fibre Cement Composites (RILEM Symposium 1978), Construction Press, Lancaster, UK, pp. 79–86.
3. Standard Test Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete (using Beam with Third-Point Loading);ASTM,1992
4. Definitions and measurement of flexural toughness parameters for fiber reinforced concrete;Johnston;Cement, Concrete Aggregate,1982