Z. Ramezani, H. Kalantari, and H. Negahbani, “Simultaneous Extraction and Determination of 5-Hydroxy tryptophol and 5-Hydroxyindol-3-acetic Acid in Urine of Alcoholism by HPLC with Fluorescence Detection”, ajc, vol. 22, no. 9, pp. 7013–7020, Jul. 2010.