Wall, M E Effect of tannins on screening of plant extracts for enzyme inhibitory activity and techniques for their removal. [electronic resource] - Phytomedicine : international journal of phytotherapy and phytopharmacology Nov 1996 - 281-5 p. digital Publication Type: Journal Article ISSN: 0944-7113 Standard No.: 10.1016/S0944-7113(96)80067-5 doi