1. P. L. Chebyshev, Selected Works (Akad Nauk SSSR, Moscow, 1955).
2. J. Alberg, E. Nilson, and J. Walsh, The Theory of Splines and Their Applications (Mir, Moscow, 1972) [in Russian].
3. Yu. S. Zav’yalov, B. I. Kvasov, and V. L. Miroshnichenko, Methods of Spline-Functions (Nauka, Moscow, 1980).
4. N. N. Kalitkin, Numerical Methods (FML, Moscow, 1978).
5. C. De Boor, Handbook on Splines (Radio i Sviaz’, Moscow, 1985) [in Russian].