1. The Essential Oils, Vol. 6, 3rd printing, p. 337, Van Nostrand, New York (1952).
2. ISO standards: 279, 280, 592, 709, 875, 1241, 1242, issued by the International Organization for Standardization.
3. , , in Proceedings of VII International Congress of Essential Oils, Kyoto, p. 112, Chemical Society of Japan, Kyoto (1980).
4. in Proceedings of the '3émes Journées Scientifiques Internationales de Digne, p. 2 (1984).