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Zhou, P.; Watson, D.G.; Midgley, J.M., Identification and quantification of «gamma»-glutamyl conjugates of biogenic amines in the nervous system of the snail, Helix aspersa, by gas chromatography-negative-ion chemical ionisation mass spectrometry, J. Chromatogr., 1993, 617, 1, 11-18, https://doi.org/10.1016/0378-4347(93)80415-Z . [all data]