Tang, Xijin. “SYSTEMIC VISION TOWARD THE STUDIES OF WU-LI SHI-LI REN-LI SYSTEM APPROACH”. Proceedings of the 55th Annual Meeting of the ISSS - 2011, Hull, UK 55, no. 1 (September 18, 2011). Accessed February 24, 2021. https://journals.isss.org/index.php/proceedings55th/article/view/1660.