Plubtieng, S. and Sriprad, W. (2011) “EXISTENCE AND APPROXIMATION OF SOLUTION OF THE VARIATIONAL INEQUALITY PROBLEM WITH A SKEW MONOTONE OPERATOR DEFINED ON THE DUAL SPACES OF BANACH SPACES”, Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), 1(1), pp. 23–33. available at: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2578 (accessed: 2 September 2026).