1. Ya. A. Furman, Introduction into Contour Analysis (Fizmatlit, Moscow, 2003) [in Russian].
2. R. C. Gonzalez and R. E. Woods, Digital Image Processing (New Jersey, Prentice Hall, 2002).
3. W. Pratt, Digital Image Processing (John Wiley and Sons, New York, 1978).
4. I. S. Gruzman, V. S. Kirichuk, et al., Digital Image Processing in Information Systems (Novosibirsk State Univ., Novosibirsk, 2002) [in Russian].
5. Ya. Z. Tsypkin, Information Theory of Identification (Nauka Fizmatlit, Moscow, 1995) [in Russian].