Quantitative analysis of facial movement - A review of three-dimensional imaging techniques. - H. Popat; Stephen Richmond; Lanthao Benedikt; A. David Marshall; Paul L. Rosin (Comput. Medical Imaging Graph., 2009)

Multilevel principal component analysis (mPCA) in shape analysis: A feasibility study in medical and dental imaging. - Damian J. J. Farnell; H. Popat; Stephen Richmond (Comput. Methods Programs Biomed., 2016)