Kumpoo, Rung, Sirirat Choosakoonkriang, and Supachai Supaluknari. “Development of microfluidic paper based analytical devices for determination of nitrate and nitrite in gunshot residues”. Rajamangala University of Technology Tawan-ok Research Journal 13, no. 1 (June 17, 2020): 10–19. accessed September 20, 2026. https://li01.tci-thaijo.org/index.php/researchjournal2rmutto/article/view/242478.