Phuong, Nguyen. “Study of Correlation Between Ink Trapping and Color Difference in Overprint”. VNUHCM Journal of Engineering and Technology 5, no. 3 (September 30, 2022): 1596-1604. Accessed July 3, 2024. https://stdjet.scienceandtechnology.com.vn/index.php/stdjet/article/view/994.