1. L. D. Gik, Fiz. Mezomekh., No. 4, 67 (2008).
2. Yu. I. Kuznetsov, Karotazhnik, No. 2 (272), 95 (2017).
3. V. V. Dryagin, D. B. Ivanov, I. A. Chernykh, and A. V. Shumilov, Karotazhnik, No. 10 (244), 57 (2014).
4. E. F. Afanas’ev, K. L. Grdzelova, and D. V. Plyushchev, Dokl. Akad. Nauk SSSR, No. 3, 554 (1987).
5. M. N. Ovchinnikov, F. F. Karimov, and A. S. Nikolaev, Georesursy, No. 1, 31 (2001).