Rapid analysis of free fatty acid composition in Brassica rapa L. and Brassica napus L. extracts by surface-assisted laser desorption/ionization time-of-flight mass spectrometryBorissova, Maria; Palk, Klairy; Vaher, MerikeProcedia chemistry2010 / p. 174-179 : ill https://www.sciencedirect.com/science/article/pii/S1876619609004215