Vi, Phung, 		Ngoc, Nguyen, 		Kim, Truong, 		Quynh, Nguyen, 		Anh, Duong, AND 		Viet, Pham.
" Determination of PAHs content in hair samples of smokers and non-smokers using gas chromatography in hyphenation with mass spectrometry" <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 35 Number 3 (17 July 2019)