Borwein, J. M., and W. B. Moors. “STABILITY OF CLOSEDNESS OF CONVEX CONES UNDER LINEAR MAPPINGS II”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 1, no. 1 (December 9, 2011): 1–7. accessed September 2, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2571.