Pinyorospathum, C., J. Choeychit, P. Tiawpisitpong, and K. Charoenkitamorn. “A fabrication of cost-effective paper-based colorimetric devices for nitrite detection”. Science, Engineering and Health Studies, vol. 16, Dec. 2022, p. 22020013, doi:10.14456/sehs.2022.54.