1. Ismatov, M., Absolute and Uniform Convergence of Fourier Generalized Integrals in an Arbitrary Domain, Mater. respub. nauch.-prakt. konf. (Proc. Repub. Sci.-Pract. Conf.), Dushanbe, 1997, pp. 222–225.
2. Friedrichs, K., On the Boundary Value Problems of the Theory of Elasticity and Korn’s Inequality, Ann. Math., 1947, vol. 48, no. 2, pp. 446–469.
3. Kupradze, V.D., Gegelia, T.G., Basheleishvili, M.O., and Burchuladze, T.V., Trekhmernye zadachi matematicheskoi teorii uprugosti i termouprugosti (Three-Dimensional Problems of the Mathematical Theory of Elasticity and Thermoelasticity), Moscow: Nauka, 1976.
4. Kupradze, V.D., Metody potentsiala v teorii uprugosti (Potential-Theoretic Methods in the Theory of Elasticity), Moscow: Gosudarstv. Izdat. Fiz.-Mat. Lit., 1963.
5. Shizuta, Y., Eigen Function Expansion Associated with the Operator −Δ in the Exterior Domain, Proc. Japan Acad., 1963, vol. 39, pp. 656–660.