Yamada, S., Tokushige, Y., Tanaka, T. and Tanino, T. (2012) “AN OUTER APPROXIMATION METHOD UTILIZING THE RELATION OF CONNECTIONS AMONG VERTICES FOR SOLVING A DC PROGRAMMING PROBLEM”, Journal of Nonlinear Analysis and Optimization: Theory & Applications, 3(1), pp. 1-12. Available at: http://www.math.sci.nu.ac.th/ojs302/index.php/jnao/article/view/71 (Accessed: 21September2021).