Rao, Vidadala Rama Subba Simultaneous determination of bioactive compounds in Piper nigrum L. and a species comparison study using HPLC-PDA. [electronic resource] - Natural product research Aug 2011 - 1288-94 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1478-6427 Standard No.: 10.1080/14786419.2010.535158 doi Subjects--Topical Terms: CalibrationChromatography, High Pressure Liquid--methodsPiper nigrum--chemistry