1. R. Chellappa, C.L. Wilson and S. Sirohey, “Human and Machine Recognition of Faces”, In Proceedings of the IEEE, The institute of electrical and electronics engineers, inc., Vol. 83, No. 5, May 1995, pp. 705–740.
2. C. Beumier, M.P. Acheroy, “Automatic Face Identification”, In Applications of Digital Image Processing XVIII, SPIE, vol. 2564, July 1995, pp. 311–323.
3. M.P. Acheroy, C. Beumier, J. Bigün, G. Chollet, B. Duc, S. Fischer, D. Genoud, P. Lockwood, G. Maitre, S. Pigeon, I. Pitas, K. Sobatta, L. Vandendorpe, “Multi-modal person verification tools using speech and images”, In Proceedings of the European Conference on Multimedia Applications, Services and Techniques (ECMAST '96), pp. 747–761, Louvain-La-Neuve, May 28–30 1996.
4. Huang Ho-Chao, Ouhyoung Ming and Ja-Ling Wu, “Automatic feature point extraction on a human face in model-based image coding”, Optical Engineering, Vol. 32, No. 7 pp. 1571–1580, July 1993.
5. L. D. Harmon, S. C. Kuo, P. F. Ramig and U. Raudkivi, “Identification of human face profiles by computer”, Pattern Recognition, Vol 10, pp. 301–312, Pergamon Press Ltd. 1978.