1. A. S. Samatov, S. T. Akramov, and S. Yu. Yunusov, KhPS [Chemistry of Natural Compounds], 3, 182, 1967.
2. T. U. Rakhmatullaev, S. T. Akramov, and S. Yu. Yunsov, KhPS [Chemistry of Natural Compounds], 5, 32, 1969.
3. Elucidation of Structures, ed. K. W. Bentley (Technique of Organic Chemistry, ed. A. Weissberger, Vol. 11) [Russian translation], Moscow, 1967.