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3. O. M. Guz, ?Stress concentration around a rigidly clamped circular opening in an orthotropic cylindrical shell, DAN URSR, no. 12, 1962.
4. S. G. Lekhnitskii, Anisotropic Plates [in Russian], GITTL, 1957.
5. G. N. Savin, ?Stress concentration around openings in shells,? collection: Theory of Plates and Shells [in Russian], Izd-vo AN USSR 1962.