Owen, R., Klerck, P., Sellers, E., & Owen, D. (2004). Discrete fracture in quasi-brittle materials under compressive and tensile stress states. Computer Methods in Applied Mechanics and Engineering, 193(27-29), p. 3035. doi:10.1016/j.cma.2003.10.015

Owen, Roger, P.A Klerck, E.J Sellers, and D.R.J Owen. "Discrete Fracture in Quasi-brittle Materials Under Compressive and Tensile Stress States." Computer Methods in Applied Mechanics and Engineering 193, no. 27-29 (2004): 3035.

Owen, Roger, P.A Klerck, E.J Sellers, and D.R.J Owen. "Discrete Fracture in Quasi-brittle Materials Under Compressive and Tensile Stress States." Computer Methods in Applied Mechanics and Engineering 193.27-29 (2004): 3035.