DETERMINATION OF MORPHINE IN HUMAN URINE BY A SIMPLE REVERSE PHASE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD WITH UV DETECTION. International Journal of Pharmaceutical Sciences and Drug Research, [S. l.], v. 5, n. 1, p. 18–22, 2013. DOI: 10.25004/IJPSDR.2013.050103. Disponível em: https://ijpsdronline.com/index.php/journal/article/view/233.. Acesso em: 15 oct. 2025.