Li, C., Cen, S., Shang, Y., Li, C., & Li, H. (2014). Hybrid displacement function element method: A simple hybrid-Trefftz stress element method for analysis of Mindlin-Reissner plate. International Journal for Numerical Methods in Engineering, 98(3), pp. 203-234. doi:10.1002/nme.4632

Li, Chenfeng, Song Cen, Yan Shang, Chen-Feng Li, and Hong-Guang Li. "Hybrid Displacement Function Element Method: A Simple Hybrid-Trefftz Stress Element Method for Analysis of Mindlin-Reissner Plate." International Journal for Numerical Methods in Engineering 98, no. 3 (2014): 203-234.

Li, Chenfeng, et al. "Hybrid Displacement Function Element Method: A Simple Hybrid-Trefftz Stress Element Method for Analysis of Mindlin-Reissner Plate." International Journal for Numerical Methods in Engineering 98.3 (2014): 203-234.