Đoàn, Đặng V., Huy, Đỗ Q., Huệ, N. Đức, & Trí, T. M. (2012). DETERMINATION OF METHAMPHETAMINE IN URINE SAMPLES BY GC-MS METHOD USING SOLID PHASE EXTRACTION (SPE). Vietnam Journal of Science and Technology, 48(5). https://doi.org/10.15625/0866-708X/48/5/1196