Hong Loan, L., Dang Khoa, P., Thien Phuc, T., & Tan Tien, N. (2008). STUDY ON DEVELOPMENT OF AN AUTOMATIC MARKING ROBOT. VNUHCM Journal of Science and Technology Development, 11(3), 95-105. https://doi.org/https://doi.org/10.32508/stdj.v11i3.2625