Sukma Utami, Ami, and Hiroki Oue. “Collective Management of Natural Resources Based on Traditional Values in West Sumatera Indonesia”. European Journal of Sustainable Development 10, no. 4 (October 1, 2021): 179. Accessed September 30, 2022. https://www.ecsdev.org/ojs/index.php/ejsd/article/view/1271.