Institóris László; Angyal Vilmos; Árok Zsófia; Kereszty Éva Margit; Varga Tibor: A simple quantitation method for benzoylecgonine from oral fluid, blood and urine samples used for determining 22 illicit and licit drugs by GC-MS with liquid/liquid extraction.
FORENSIC TOXICOLOGY, 30 (1). pp. 59-65. ISSN 1860-8965 (2012)