Fitri Y, Nainggolan S. Analysis of technical efficiency and socio-economic factors influencing the development of smallholder oil palm plantations in Batanghari Regency, Indonesia. JES [Internet]. 2023 Feb. 28 [cited 2025 Apr. 26];10(6):451-66. Available from: https://online-journal.unja.ac.id/JES/article/view/38755