Simultaneous determination of nineteen hallucinogenic tryptamines/beta-calbolines and phenethylamines using gas chromatography-mass spectrometry and liquid chromatography-electrospray ionisation-mass spectrometry Kikura-Hanajiri, R.; Hayashi, M.; Saisho, K.; Goda, Y. Journal of Chromatography. B Analytical Technologies in the Biomedical and Life Sciences 825(1): 29-37 2005 https://eurekamag.com/research/012/559/012559622.php