1. M. S. Yunusov, Izv. Ross. Akad. Nauk, Ser. Khim., 620 (2011).
2. S. F. Sokolov, Vestn. Aritmol., 64, 60 (2011).
3. S. F. Sokolov and F. N. Dzhakhangirov, Kardiologiya, 7, 96 (2002).
4. A. Z. Sadikov, Doctoral Dissertation in Tech. Sci., S. Yu. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, 2016, 137 pp.
5. H. Schulze, Arch. Pharm. Ber. Dtsch. Pharm. Ges., 260, 230 (1922).