1. Akhiezer, N. I. (1941). Infinite matrices Jacobi and the problem of moments (in Russian). Uspekhi Matematicheskikh Nauk, 9, 126–156.
2. Akhiezer, N. I. (1965). The classical moment problem (vol. X, 252pp.).
3. Berezanskiı̆, Y. M. (1956). Expansion according to eigenfunction of a partial difference equation of order two (in Russian). Trudy Moskovskogo Matematicheskogo Obshchestva, 5, 203–268.
4. Berezanskiı̆, Y. M. (1956). On expansion according to eigenfunctions of general self-adjoint differential operators in (Russian). Doklady Akademii Nauk SSSR (N.S.), 108, 379–382.
5. Berezanskiı̆, J. M. (1968). Expansions in eigenfunctions of selfadjoint operators. Translations of mathematical monographs (vol. 17, ix+809pp.). American Mathematical Society. Translated from the Russian by R. Bolstein, J. M. Danskin, J. Rovnyak and L. Shulman.