1. Yu. V. Vorob’ev, Method of Moments in Applied Mathematics (Fizmatgiz, Moscow, 1958; Gordon and Breach, New York, 1965).
2. N. I. Akhiezer, The Classical Moment Problem and Some Related Questions in Analysis (Fizmatgiz, Moscow, 1961; Oliver and Boyd, Edinburgh, 1965).
3. J. Liesen and Z. Strakos, Krylov Subspace Methods: Principles and Analysis (Oxford Univ. Press, Oxford, 2013).
4. Y. Saad, Iterative Methods for Sparse Linear Systems, 2nd ed. (SIAM, Philadelphia, 2003).
5. V. P. Il’in, Finite Element Methods and Technologies (Inst. Vychisl. Mat. Mat. Geofiz. Sib. Otd. Ross. Akad. Nauk, Novosibirsk, 2007) [in Russian].