Zapala, K., Szymczak, G., & Wojciak-Kosior, M. (2014). Determination of caffeic acid in root and rhizome of Black cohosh (Cimicifuga racemosa (L.) Nutt.). Current Issues in Pharmacy and Medical Sciences, 27(2), 108-110. https://doi.org/10.2478/cipms-2014-0025