Zavelberg, Yvonne, Thomas Heckelei, and Christine Wieck. “Entry Deterring Effects of Contractual Relations in the Dairy Processing Sector”. Bio-based and Applied Economics 5, no. 1 (April 13, 2016): 83–98. Accessed May 21, 2024. https://oaj.fupress.net/index.php/bae/article/view/3287.