V. G. Klimenko, V. L. Rvachev, “The completeness with respect to energy of systems of coordinate functions which one constructs by the method of $R$-functions”, Differ. Uravn., 5:9 (1969), 1724–1726
2.
V. G. Klimenko, “Taking into account the symmetry in the solution of boundary value problems by variational methods”, Differ. Uravn., 5:8 (1969), 1517–1522
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