1. F. D. Gakhov, Boundary Value Problems (Addison-Wesley, Reading, Mass., 1966).
2. N. I. Muskhelishvili, Singular Integral Equations (Nauka, Moscow, 1966) [in Russian].
3. V. V. Ivanov, Theory of Approximate Methods and Its Application to the Numerical Solution of Singular Integral Equations (Naukova Dumka, Kiev, 1968) [in Russian].
4. I. Ts. Gokhberg and I. A. Fel’dman, Convolution Equations and Projection Methods of Their Solution (Nauka, Moscow, 1971) [in Russian].
5. S. M. Belotserkovskii and I. K. Lifanov, Numerical Methods in Singular Integral Equations (Nauka, Moscow, 1985) [in Russian].