1. Feshin, V.P., Feshina, E.V., and Zhizhina, L.I., Zh. Obshch. Khim., 2006, vol. 76, no. 5, p. 770.
2. Lucken, E.A.C., Nuclear Quadrupole Coupling Constants, New York: Academic, 1969.
3. Hart, R.M. and Whitehead, M.A., Can. J. Chem., 1971, vol. 49, no. 15, p. 2508.
4. Voronkov, M.G. and Feshin, V.P., Org. Magn. Reson., 1977, vol. 9, no. 12, p. 665.
5. Feshin, V.P., Voronkov, M.G., Dolgushin, G.V., Nikitin, P.A., Lazarev, I.M., Sapozhnikov, Yu.E., and Yasman, Ya.B., Dokl. Akad. Nauk SSSR, 1983, vol. 268, no. 5, p. 1163.