1. G. P. Cherepanov, ?Some problems of elasticity and plasticity theory with unknown boundary,? in: Applications of the Theory of Functions to the Mechanics of Continuous Media [in Russian], Vol. 1, Nauka, Moscow (1965).
2. S. G. Lekhnitskii, Anisotropic Plates [in Russian], Gostekhizdat, Moscow (1957).
3. G. N. Savin, Stress Distribution close to Holes [in Russian], Naukova Dumka, Kiev (1968).
4. G. P. Cherepanov, ?Boundary-value problems with analytic coefficients,? Dokl. Akad. Nauk SSSR,161, No. 2 (1965).