1. B. G. Gabdulkhaev, Direct Methods for Solving Singular Integral Equations of the First Kind (Kazan. Univ., Kazan, 1980) [in Russian].
2. B. G. Gabdulkhaev, Optimal Approximations of Solutions of Linear Problems (Kazan. Univ., Kazan, 1994) [in Russian].
3. F. D. Gakhov, Boundary Value Problems (Nauka, Moscow, 1977) [in Russian].
4. L. V. Kantorovich and G. P. Akilov, Functional Analysis in Normed Spaces (Pergamon, Oxford, 1964).
5. L. E. Khayrullina, Uniform Convergence of Approximate Solutions of a Singular Integral Equation of the First Kind with a Cauchy Kernel (Kazan, 2011) [in Russian].