1. V. L. Rvachev and V. A. Rvachev, “A certain finite function,” Dokl. Akad. Nauk UkrSSR, Ser. A, No. 8, 705–707 (1971).
2. V. L. Rvachev and V. A. Rvachev, “Atomic functions in mathematical physics,” in: Mathematization of Knowledge and Scientific and Technological Advance, Naukova Dumka, Kiev (1975), pp. 188–199.
3. V. A. Rvachev, “Atomic functions and their applications,” in: Theory of R-Functions and Topical Problems of Applied Mathematics, Naukova Dumka, Kiev (1986), pp. 45–65.
4. V. L. Rvachev and V. A. Rvachev, Nonclassical Methods of Approximation Theory in Boundary-Value Problems [in Russian], Naukova Dumka, Kiev (1979).
5. V. A. Rvachev, “Atomic functions and approximation theory,” Trans. of the V. A. Steklov Mat. Inst., 180, 186–187 (1987).