1. Lang T, Lang R, Di Pizio A, Mittermeier VK, Schlagbauer V, Hofmann T, Behrens M: Numerous Compounds Orchestrate Coffee's Bitterness. J Agric Food Chem. 2020 Jun 17;68(24):6692-6700. doi: 10.1021/acs.jafc.0c01373. Epub 2020 Jun 5. [PubMed:32437139 ]