Hosgood, Nicolas, and Eric Penot. “Hti Plantations in Sumatra: Opportunity Costs As a Tool for Negotiations Between Local Communities and Private Companies”. BOIS & FORETS DES TROPIQUES 295, no. 295 (March 1, 2008): 59–69. Accessed August 25, 2024. https://revues.cirad.fr/index.php/BFT/article/view/20393.