Feng, Y., Feng, Y., Zhao, T., Wang, M., Owen, D., & Owen, R. (2018). Characterising particle packings by principal component analysis. Computer Methods in Applied Mechanics and Engineering, 340, pp. 70-89. doi:10.1016/j.cma.2018.05.018

Feng, Yuntian, Y.T Feng, Tingting Zhao, Min Wang, D.R.J Owen, and Roger Owen. "Characterising Particle Packings By Principal Component Analysis." Computer Methods in Applied Mechanics and Engineering 340 (2018): 70-89.

Feng, Yuntian, et al. "Characterising Particle Packings By Principal Component Analysis." Computer Methods in Applied Mechanics and Engineering 340 (2018): 70-89.