1. F. D. Gakhov, Boundary Value Problems (Nauka, Moscow, 1977) [in Russian].
2. I. Ts. Gokhberg and I. A. Feldman, Convolution Equations and Projection Methods for Their Solution (Nauka, Moscow, 1971) [in Russian].
3. I. Ts. Gokhberg and N. Ya. Krupnik, Introduction to the Theory of One-Dimensional Singular Integral Equations (Stiinca, Kishinev, 1973) [in Russian].
4. A. E. Pasenchuk, Discrete Operators of Convolution Type in Classes of Sequences with Power Behavior at Infinity (Southern Federal University, Rostov-on-Don, 2013) [in Russian].
5. S. Prößdorf, Einige Klassen singulärer Gleichungen (Birkhäuser, Stuttgart–Basel, 1974).