1. N. I. Dovgoshei, D. V. Chepur, and R. G. Nikolyuk, Abstracts of Reports to the XIX Scientific Conference of Uzhgorod State University, Uzhgorod, Physics Series [in Russian] (1965), p. 34.
2. N. I. Dovgoshei, D. V. Chepur, and R. G. Nikolyuk, Abstracts of Reports to the II Conference of Young Scholars in the Natural Sciences, Uzhgorod State University, Uzhgorod [in Russian] (1966), p. 40.
3. N. I. Dovgoshei, D. V. Chepur, I. A. Gryadil', R. G. Nikolyuk, and E. T. Kovach, All-Union Conference on AII BVI Semiconducting Compounds and Their Applications. Abstracts of Reports [in Russian], Izd. Naukova Dumka, Kiev (1966), p. 61.
4. N. I. Dovgoshei, D. V. Chepur, I. A. Gryadil', R. G. Nikolyuk, and I. I. Yatskovich, Abstracts of Reports to the XIX Scientific Conference of Uzhgorod State University, Uzhgorod, Physics Series [in Russian] (1965), p. 25.
5. N. I. Dovgoshei, D. V. Chepur, and I. A. Gryadil', Abstracts of Reports to the II Conference of Young Scholars in the Natural Sciences, Uzhgorod State University, Uzhgorod [in Russian] (1966), p. 24.