Kochan, Ewa, and Aleksander Chmiel. “Callus of American Ginseng (Panax Quinquefolius) As a Source of Ginsenosides – Medicinal Secondary Metabolites”. Biological Letters 50, no. 1 (March 12, 2014): 27–34. Accessed May 22, 2024. https://pressto.amu.edu.pl/index.php/BIOLET/article/view/biolet-2013-0002.