Lâm, Q. V., T. A. Lê, H. N. Trần, H. P. Vo, and A. V. Dao. “(Google Translate) Open Source Software Solution for Workflow Document Management”. Journal of Technical Education Science, vol. 4, no. 3, Dec. 2009, pp. 76-81, https://www.jte.edu.vn/index.php/jte/article/view/877.