1. É. T. Oganesyan, V. S. Gherevatyi, V. I. Yakovenko, and L. I. Kiril'chuk, Author's Cert. (USSR) No. 593,425; Otkrytiya, No. 16 (1982).
2. É. T. Ogapesyan, V. I. Yakovenko, V. S, Gherevatyi, and M. D. Gaevyi, Author's Cert. (USSR) No. 677,262; ibid.
3. E. T. Oganesyan, V. A. Kompantsev, V. A. Makarov, and S. A. Rekkandt, Author's Cert, (USSR) No. 694, 009; ibid.
4. É. T. Oganesyan, V. A. Kompantsev, V. A. Makarov, and S. A. Rekkandt, Author's Cert. (USSR) No. 750,960; ibid.
5. É. T. Oganesyan, Yu. K. Vasilenko, V. A. Kompantsev, and N. G. Milenina, Author's Cert. (USSR) No. 1,025,087; ibid.