Yayayürük, Aslı Erdem, Selim Girgin, Serkan Vuruk, Ülkü Güler, Melike Güngör, Halil İbrahim Bostancı, and Serap Annette Akgür. “Comparison of Extraction Methods for 11-Nor-Delta-9-Tetrahydrocannabinol-9-Carboxylic Acid (Thc-Cooh) in Urine Samples Prior to GC-MS Analysis”. The Bulletin of Legal Medicine 21, no. 1 (April 1, 2016): 1–7. Accessed September 7, 2025. https://www.adlitipbulteni.com/index.php/atb/article/view/987.