1. K. I. Babenko, Foundations of Numerical Analysis, Moscow–Izhevsk (2002).
2. D. L. Berman, “On the question of the best system of nodes of parabolic interpolation,” Izv. Vyssh. Ucheb. Zaved. Mat., 4 (35), 20–25 (1963).
3. L. Brutman, “Lebesgue functions for polynomial interpolation. A survey,” Ann. Numer. Math., 4, 111–127 (1997).
4. B. G. Gabdulkhaev, Optimal Approximations of Solutions of Linear Problems [in Russian], Izd. Kazan Univ., Kazan (1980).
5. V. L. Goncharov, Theory of Interpolation and Approximation of Functions [in Russian], GTTI, Moscow–Leningrad (1934).