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2. M. I. Gorbunov-Posadov, Tables for Calculations Involving Beams on an Elastic Base [in Russian], Gosstroiizdat, Moscow-Leningrad (1939).
3. I. S. Gradshtein and I. M. Ryzhik, Tables of Integrals, Sums, Series, and Products [in Russian], Fizmatgiz, Moscow (1962).
4. S. A. Lutchenko, ?Indentation of a stamp into the lateral surface of a wedge-shaped elastic base,? Prikl. Mekhan. ,2, No. 12 (1966).
5. S. A. Lutchenko, ?Sag of a beam on an elastic base of varying depth,? Izv. VUZ. Stroitel'stvo i Arkhitektura, No. 9 (1967).