Bonet, J., Lahiri, S. K., & Peraire, J. (2010). A variationally consistent mesh adaptation method for triangular elements in explicit Lagrangian dynamics. International Journal for Numerical Methods in Engineering, 82(9), pp. 1073-1113. doi:10.1002/nme.2784

Bonet, Javier, Sudeep K. Lahiri, and Jaume Peraire. "A Variationally Consistent Mesh Adaptation Method for Triangular Elements in Explicit Lagrangian Dynamics." International Journal for Numerical Methods in Engineering 82, no. 9 (2010): 1073-1113.

Bonet, Javier, Sudeep K. Lahiri, and Jaume Peraire. "A Variationally Consistent Mesh Adaptation Method for Triangular Elements in Explicit Lagrangian Dynamics." International Journal for Numerical Methods in Engineering 82.9 (2010): 1073-1113.