1. Osteoporosis Handbook, Ed. by L. I. Benevolenskaya (BINOM. Knowledge Lab., Moscow, 2003) [in Russian].
2. S. A. Reinberg, X-Ray Diagnostics of Bones and Joints Diseases (Medicine, Moscow, 1964), Vol. 1 [in Russian].
3. M. Singh, A. R. Nagrath, and P. S. Maini, “Changes in trabecular pattern of the upper end of the femur as an index of osteoporosis,” J. Bone Joint Surg. Am. 52 (3), 457–467 (1970).
4. V. E. Gmurman, Probability Theory and Mathematical Statistics (Higher School, Moscow, 1972) [in Russian].
5. M. Petrou and P. Garcia Sevilla, Image Processing: Dealing with Texture (John Wiley & Sons, Chichester, 2006).