1. O. N. Litvin and I. V. Sergienko, “Methods of function approximation and modern computer-based technologies (Review),” Cybern. Syst. Analysis, 43, No. 1, 50–65 (2007).
2. V. F. Snigirev, “On the problem of analytical design of aircraft surfaces,” Izv. VUZov, Aviats. Tekhnika, No. 4, 100–102 (1983).
3. V. F. Snigirev, “Applying functional splines to construct aircraft surfaces,” Izv. VUZov, Aviats. Tekhnika, No. 4, 77–80 (1984).
4. V. L. Rvachev, Theory of R-Functions and Some its Applications [in Russian], Nauchnaya Mysl’, Kyiv (1986).
5. O. M. Lytvyn, Interlineation of Functions and Some its Applications [in Ukrainian], Osnova, Kharkov (2002).