1. J. L. Simonsen, The Terpenes, Vol. I–V, 1947–1952, Cambridge University Press, London
2. M. Holub, D. P. Popa, V. Herout, and F. Šorm, Coll. Czechoslov. Chem. Commun., 29, 938 (1964); M. Holub, Z. Samek, D. P. Popa, V. Herout, and F. Šorm, ibid., 35, 284 (1970)
3. N. P. Kiryalov, Zhur. Obshch. Khim., 34, 3831 (1964); N. P. Kiryalov and S. V. Serkerov, ibid., 34, 2813 (1964); Khim. Prir. Soedin., 2, 93 (1966); ibid., 4, 341 (1968); S. V. Serkerov, ibid., 5, 241 342, 378 (1969)
4. K. Takeda, H. Minato, and I. Horibe, Tetrahedron, 19, 2307 (1963); K. Takeda, H. Minato, K. Hamamoto, I. Horibe, T. Nagasaki, and M. Ikuta, J. Chem. Soc., 3577 (1964); K. Takeda, H. Minato, and M. Ishakawa, ibid., 4578 (1964); K. Takeda, I. Horibe, M. Teraoka, and H. Minato, ibid., 1491, 2786 (1969); ibid., 973 (1970)
5. B. S. Joshi, K. N. Khamat, and T. R. Govidachari, Tetrahedron, 23, 261, 267, 273 (1967)