Zienkiewicz, O., Oñate, E., Rojek, J., & Taylor, R. L. (2004). Finite calculus formulation for incompressible solids using linear triangles and tetrahedra. International Journal for Numerical Methods in Engineering, 59(11), pp. 1473-1500. doi:10.1002/nme.922

Zienkiewicz, Olgierd, Eugenio Oñate, Jerzy Rojek, and Robert L. Taylor. "Finite Calculus Formulation for Incompressible Solids Using Linear Triangles and Tetrahedra." International Journal for Numerical Methods in Engineering 59, no. 11 (2004): 1473-1500.

Zienkiewicz, Olgierd, Eugenio Oñate, Jerzy Rojek, and Robert L. Taylor. "Finite Calculus Formulation for Incompressible Solids Using Linear Triangles and Tetrahedra." International Journal for Numerical Methods in Engineering 59.11 (2004): 1473-1500.