Roesener, A. G., & Hall, S. N. (2014). A NONLINEAR INTEGER PROGRAMMING FORMULATION FOR THE AIRLIFT LOADING PROBLEM WITH INSUFFICIENT AIRCRAFT. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), 5(1), 125–141. retrieved from https://ph03.tci-thaijo.org/index.php/jnao/article/view/2744