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3. Nikolsky, S.M. Quadrature formulas (Nauka, Moscow, 1988) [in Russian].
4. Bakhvalov, N.S., Zhidkov, N.P., Kobel'kov, G.M. Numerical methods (Nauka, Moscow, 1987) [in Russian].
5. Babenko, K.I. Foundations of numerical analysis (Nauka, Moscow, 1986) [in Russian].