Witoonchart, Kiat, Pitchapa Pittayavinai, Supranee Watpathomsub, Natt Thiensukont, Phongthon Sukosi, Dhanes Rangsrikajee, Poonsri Rangseekajee, Tamkan Junyangdikul, and Titiya Meechai. 2025. “Analysis of nicotine residue in cigarettes after smoking using UV-visible spectrophotometry”. Journal of Medical Globalization 3 (3):52-57. https://he01.tci-thaijo.org/index.php/JMedGlob/article/view/278957.