Sidney J. Stohs, Harry G. Preuss, Mohd Shara: A review of the human clinical studies involving Citrus aurantium (bitter orange) extract and its primary protoalkaloid p-synephrine. In: International Journal of Medical Sciences. Band9, Nr.7, 1. Januar 2012, S.527–538, doi:10.7150/ijms.4446, PMC 3444973 (freier Volltext).
Gilbert R. Kaats, Howard Miller, Harry G. Preuss, Sidney J. Stohs: A 60day double-blind, placebo-controlled safety study involving Citrus aurantium (bitter orange) extract. In: Food and Chemical Toxicology: An International Journal Published for the British Industrial Biological Research Association. Band55, 1. Mai 2013, S.358–362, doi:10.1016/j.fct.2013.01.013, PMID 23354394.
Sidney J. Stohs, Harry G. Preuss, Mohd Shara: A review of the human clinical studies involving Citrus aurantium (bitter orange) extract and its primary protoalkaloid p-synephrine. In: International Journal of Medical Sciences. Band9, Nr.7, 1. Januar 2012, S.527–538, doi:10.7150/ijms.4446, PMC 3444973 (freier Volltext).
Sidney J. Stohs, Harry G. Preuss, Samuel C. Keith, Patti L. Keith, Howard Miller: Effects of p-synephrine alone and in combination with selected bioflavonoids on resting metabolism, blood pressure, heart rate and self-reported mood changes. In: International Journal of Medical Sciences. Band8, Nr.4, 28. April 2011, S.295–301, PMC 3085176 (freier Volltext).
Gilbert R. Kaats, Howard Miller, Harry G. Preuss, Sidney J. Stohs: A 60day double-blind, placebo-controlled safety study involving Citrus aurantium (bitter orange) extract. In: Food and Chemical Toxicology: An International Journal Published for the British Industrial Biological Research Association. Band55, 1. Mai 2013, S.358–362, doi:10.1016/j.fct.2013.01.013, PMID 23354394.