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2. G. N. Savin, Stress Distribution Near Holes [in Russian] Naukova Dumka, Kiev (1968).
3. A. S. Kosmodamianskii, ?Quasiregular infinite systems in the problem of stress concentration near curved holes,? Prikl. Mekh.,1, No. 1 (1965).
4. A. S. Kosmodamianskii, ?Multiply connected problems in two-dimensional elasticity theory (survey),? Prikl. Mekh.,3, No. 2 (1967).
5. N. I. Muskhelishvili, Some Fundamental Problems in the Mathematical Theory of Elasticity [in Russian], Nauka, Moscow (1966).