1. Pevzner, L.M., Ponyaev, A.I., Russ. J. Gen. Chem., 2019, vol. 89, no. 1, p. 49. doi
https://doi.org/10.1134/S1070363219010080
2. Pevzner, L.M., Russ. J. Gen. Chem., 2019, vol. 89, no. 2, p. 244. doi
https://doi.org/10.1134/S1070363219020129
3. US Patent 5840917A, 1998
4. Levy, G.C. and Lichter, R.L., Nitrogen-15 Nuclear Magnetic Resonance Spectroscopy, New York: Wiley Interscience, 1979, p. 102.
5. Mel’nykov, V.V., Baeva, L.F., and Gidaspov, B.V., Zh. Prikl. Spectroskop., 1973, vol. 18, no. 1, p. 87.