Park, S. “GENERALIZATIONS OF THE KKMF PRINCIPLE HAVING COERCING FAMILIES”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 4, no. 2 (June 18, 2013): 39–49. accessed October 14, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2701.