1. A. N. Zaidel, V. M. Nemets, and A. A. Petrov, ZhPS [Journal of Applied Spectroscopy],2, 1, 1967.
2. A. N. Zaidel, V. M. Nemets, and A. A. Petrov, Transactions of the 16th Spectroscopy Conference, Abstracts [in Russian], Moscow, p. 33, 1965.
3. V. M. Nemets and A. A. Petrov, ZhPS [Journal of Applied Spectroscopy],4, 2, 1966.
4. A. N. Zaidel, N. M. Orlova, A. A. Petrov, and T. Ya. Chelidze, Transactions of the 15th Spectroscopy Conference, Vol. 2 [in Russian], VINITI, p. 368, 1965.
5. A. N. Zaidel, G. V. Ostrovskaya, and A. A. Petrov, Opt. i spekt., 10, 673, 1961.