Hartako, H. and Arman Nasution 2026. Restructuring the Business Model of Smallholder Oil Palm Plantations in Forest Areas of Central Kalimantan Province: An Integration of Pestel-Porter Diagnostics and Social Forestry Solutions. International Journal of Science and Society. 8, 3 (Jul. 2026), 18-41. DOI:https://doi.org/10.54783/ijsoc.v8i3.1709.