1. BOLDS 2019. Kingdoms of Life being barcoded. In: Kingdoms of Life being barcoded.BOLD Systems. http://www.boldsystems.org/index.php/TaxBrowser_Home
2. Botanische Gärten der Universität Bonn 2019. Botanical gardens of the University of Bonn. (Botanische Gärten der Universität Bonn). Germany: Universität Bonn. http://www.botgart.uni-bonn.de/index.php
3. Chang CS, Kim H, Chang KS, 2014. Provisional checklist of vascular plants for the Korea Peninsula Flora (KPF). Seoul, South Korea. 660 pp.
4. Flora of China Editorial Committee 2019. Flora of China. In: Flora of China.St. Louis Missouri and Cambridge Massachusetts USA: Missouri Botanical Garden and Harvard University Herbaria.http://www.efloras.org/flora_page.aspx?flora_id=2
5. Grae I , 1974. Nature's colors: dyes from plants. New York, USA: Macmillan. 229 pp.