1. N. K. Kucher, ?The use of degenerated three-dimensional finite elements for the stress analysis of shell structures,? Probl. Prochn., No. 5, 98?102 (1984).
2. P. P. Voroshko, ?Mixed variational formulations of problems of the theory of elasticity and their realization,? Probl. Prochn., No. 1, 100?105 (1985).
3. V. L. Biderman, The Mechanics of Thin-Walled Structures [in Russian], Mashinostroenie, Moscow (1977).
4. A. P. Filippov, Vibrations of Deformed Systems [in Russian], Mashinostroenie, Moscow (1970).
5. Yu. B. Glad'yu, ?Vibrations of a beam elastically connected with a concentrated mass,? Probl. Prochn., No. 5, 64?66 (1984).