The determination of 11-nor-Delta(9)-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in hair using negative ion gas chromatography-mass spectrometry and high-volume injection
C. Moore et al., The determination of 11-nor-Delta(9)-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in hair using negative ion gas chromatography-mass spectrometry and high-volume injection, J ANAL TOX, 25(7), 2001, pp. 555-558