Kumala PutriE. I.; DharmawanA. H.; AmaliaR.; K. PandjaitanN. Social Economic and Ecological Adaptive Strategy of Livelihood of Smallholders in the Oil Palm Expansion Areas (Case Studies in Two Villages of Central Kalimantan). Sodality: Jurnal Sosiologi Pedesaan, v. 6, n. 2, 13 Sep. 2018.