Feng N., Minder E., Grampp T., Vonderschmitt D.
Journal of Chromatography B., Biomedial Sciences and Application 1992, 575 (2), 289-294
Identification and quantification of ergotamine in human plasma by gas chromatography-mass spectrometry.
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http://dx.doi.org/10.1016/0378-4347(92)80159-N
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