Anakkamatee, W., and S. Dhompongsa. “ON THE MEANS OF PROJECTIONS ON CAT(0) SPACES”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 4, no. 2 (July 11, 2013): 51–59. accessed October 14, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2702.