Hassan, O., Bonet, J., Marriott, H., & Hassan, O. (2001). Stability and comparison of different linear tetrahedral formulations for nearly incompressible explicit dynamic applications. International Journal for Numerical Methods in Engineering, 50(1), pp. 119-133. doi:10.1002/1097-0207(20010110)50:1<119::AID-NME24>3.0.CO;2-C

Hassan, Oubay, J. Bonet, H. Marriott, and O. Hassan. "Stability and Comparison of Different Linear Tetrahedral Formulations for Nearly Incompressible Explicit Dynamic Applications." International Journal for Numerical Methods in Engineering 50, no. 1 (2001): 119-133.

Hassan, Oubay, J. Bonet, H. Marriott, and O. Hassan. "Stability and Comparison of Different Linear Tetrahedral Formulations for Nearly Incompressible Explicit Dynamic Applications." International Journal for Numerical Methods in Engineering 50.1 (2001): 119-133.