1. US Patent 2500388.
2. Conte, L., Napoli, M., and Gambaretto, G.P., J. Fluorine Chem., 1986, vol. 30, no. 1, pp. 89–97.
3. Velayutham, D., Jayaraman, K., Noel, M., et al., J. Fluorine Chem., 2002, vol. 115, no. 1, pp. 21–26.
4. Plashkin, V.S., Pushkina, L.N., Kolegov, V.F., and Sokolov, S.V., Zh. Vses. Khim. O-va, 1967, no. 2, pp. 237–238.
5. Emsley, J.W., Phillips, L., and Wray, V., Prog. Nucl. Magn. Reson. Spectrosc., 1971, vol. 10, part 3/4, pp. 83–756.