1.Pham TTH, Phan QH, Nguyen DA, Le NB. Design and implementation of a low cost optical based paint viscosity control device. Vietnam J. Sci. Technol. [Internet]. 2022 Dec. 30 [cited 2026 Jan. 10];60(6):1179-90. Available from: https://vjs.ac.vn/jst/article/view/16506