Kendall, D.G. Shape Manifolds, Procrustean Metrics, and Complex Projective Spaces. Bulletin of the London Mathematical Society. 1984, 16 (2): 81–121. doi:10.1112/blms/16.2.81.
Biederman, Irving. Recognition-by-components: A theory of human image understanding. Psychological Review. 1987, 94 (2): 115–47. PMID 3575582. doi:10.1037/0033-295X.94.2.115.
Biederman, Irving. Recognition-by-components: A theory of human image understanding. Psychological Review. 1987, 94 (2): 115–47. PMID 3575582. doi:10.1037/0033-295X.94.2.115.