1. Arya S (1995) Nearest neighbor searching and applications. In Ph. D. Thesis, University of Maryland, College Park, Maryland
2. Belhumeur P, Hespanha J, Kriegman D (1997) Eigenfaces vs. fisherfaces: recognition using class specific linear projection. IEEE TPAMI 19(7):711–720
3. Bergen J, Landy M (1991) Computational modeling of visual texture segregation. In computational models of visual perception. MIT, Cambridge Massachusetts, 1991, pp 253–271
4. Chellappa R, Wilson C, Sirohey S (1995) Human and machine recognition of faces: a survey. Proc IEEE 83(5):705–740
5. Ekman P, Friesen W (1976) Pictures of facial affect. In Consulting psychologist, Palo Alto, California