1. F. D. Gakhov, Boundary-Value Problems [in Russian], Nauka, Moscow, 1977.
2. N. I. Muskhelishvili, Singular Integral Equations [in Russian], Nauka, Moscow, 1968.
3. S. M. Belotserkovskii and M. I. Nisht, Separated and Nonseparated Flow Around Thin Wings by an Ideal Fluid [in Russian], Moscow, 1978.
4. V. V. Panasyuk, M. P. Savruk, and A. P. Datsyshin, Distribution of Stresses near Cracks in Plates and Shells [in Russian], Naukova Dumka, Kiev, 1976.
5. V. Z. Parton and P. I. Perlin, Integral Equations of Elasticity Theory [in Russian], Nauka, Moscow, 1977.