1. Nikitin, E.V., Zagumennov, V.A., Romakhin, A.S., Kosachev, I.P., and Babkin, Y.A., Electrochim. Acta, 1997, vol. 42, no.14, p. 2205.
2. Zagumennov, V.A., Romakhin, A.S., and Nikitin, E.V., Zh. Obshch. Khim., 1999, vol. 69, no.5, p. 803.
3. Pentegova, V.A., Dubovichenko, Zh.V., Raldugin, V.A., and Shmidt, E.N., Terpenoidy khvoinykh rastenii (Terpenoids of Coniferous Plants), Novosibirsk: Nauka, 1987.