1. Chiva-Blanch G, Urpi-Sarda M, Rotches-Ribalta M, Zamora-Ros R, Llorach R, Lamuela-Raventos RM, Estruch R, Andres-Lacueva C: Determination of resveratrol and piceid in beer matrices by solid-phase extraction and liquid chromatography-tandem mass spectrometry. J Chromatogr A. 2011 Feb 4;1218(5):698-705. doi: 10.1016/j.chroma.2010.12.012. Epub 2010 Dec 13. [PubMed:21196008 ]