Peamkrasatam, S., K. Sriwatanakul, V. Wananukul, T. Sura, P. Chavalittumrong, S. Chivapat, T. Kamataki, and K. Yoovathaworn. “In Vivo Phenotyping of CYP2A6 in Thais: Coumarin VS Nicotine”. Journal of Basic and Applied Pharmacology, vol. 27, no. 1, July 2015, p. 63, https://li01.tci-thaijo.org/index.php/JBAP/article/view/37320.