Dan Thu, Tran, and Huynh Bao Tran. “APPLYING OBJECT- ORIENTED DESIGN PATTERNS IN CONSTRUCTING TCP/IP NETWORK APPLICATIONS”. Science and Technology Development Journal 9, no. 7 (July 31, 2006): 5-14. Accessed May 20, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/2922.