Ha Thi Thu Hoai, Nguyen Trong Nghia, and Nguyen Thi Quynh Hoa. “PROCEDURE OPTIMIZATION FOR DETERMINATION OF PERFLUOROOCTANE SULFONIC ACID (PFOS) AND PERFLUOROOCTANOIC ACID (PFOA) IN PAPER – BASED FOOD PACKAGING SAMPLES”. UTEHY Journal of Applied Science and Technology, Vol. 36, Dec. 2022, pp. 27-32, http://jst.utehy.edu.vn/index.php/jst/article/view/568.