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2. J.-C. Nedelec, Acoustic and Electromagnetic Equations: Integral Representations for Harmonic Problems (Springer, New York, 2001).
3. D. Colton and R. Kress, Integral Equation Methods in Scattering Theory (Wiley, New York, 1984; Mir, Moscow, 1987).
4. D. Colton and R. Kress, Inverse Acoustic and Electromagnetic Scattering Theory (Springer-Verlag, Berlin, 1992).
5. A. B. Samokhin, Integral Equations and Iteration Methods in Electromagnetic Scattering (Radio i Svyaz’, Moscow, 1998) [in Russian].