1. Dahlblom, O., Ottosen, N., 1990. Smeared crack analysis using generalized fictitious crack model. J. Eng. Mech. ASCE 116, 55–76.
2. Di Tommaso, A., Valente, G., 1991. Pull-out test with fracture and aggregate interlock. RILEM TC90-FMA, Preliminary Report, 2nd ed. by L. Elfgren.
3. Etse, G., 1992. Theoretische und numerische Untersuchung zum diffusen und lokalisierten Versagen in Beton (in German). Dr.-Ing. Thesis, Institut of Mechanics, University of Karlsruhe, Germany.
4. Etse, G., Willam, K., 1994. Fracture energy formulation for inelastic behavior of plain concrete. J. Eng. Mech. ASCE 120–9, 1983–2011.
5. Kierkegaard-Hansen, P., 1975. Lok-strength. Nordisk Betong 19, 19–28.