1. P. L. Chebyshev, Complete Collection of Works (Akad. Nauk SSSR, Moscow, 1948) [in Russian].
2. E. I. Zolotarev, Complete Collection of Works (Akad. Nauk SSSR, St. Petersburg, 1912) [in Russian].
3. V. M. Tikhomirov, Mat. Sb. 80, 290–304 (1969).
4. S. Karlin, Spline Functions and Approximation Theory (Academic, New York, 1976), pp. 371–460.
5. A. S. Cavaretta, J. Anal. Math. 28, 41–59 (1975).