Seidel, Claudia, and Wolfgang Britz. “Estimating a Dual Value Function As a Meta-Model of a Detailed Dynamic Mathematical Programming Model”. Bio-based and Applied Economics 8, no. 1 (February 24, 2020): 75-99. Accessed May 28, 2020. https://oaj.fupress.net/index.php/bae/article/view/8147.