Simultaneous Determination of Theobromine, Paraxanthine, Theophylline, and Caffeine in Urine by Reversed-Phase High-Performance Liquid Chromatography with Diode Array UV Detection
2007 ◽
Vol 43
(2)
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pp. 506-514
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2005 ◽
Vol 819
(2)
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pp. 229-235
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2006 ◽
Vol 61
(2)
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pp. 139-146
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1990 ◽
Vol 527
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pp. 351-359
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