Lubis, Putri Kemala Dwi, Ondo Apostel Purba, Aurick Mathias Danarya Purba, Obed Sion Gultom, and Jhon Veriyanto. “Eco-Efficiency Sawit Sumut: Memangkas Biaya Produksi PKS Melalui Manajemen Limbah Berkelanjutan”. RIGGS: Journal of Artificial Intelligence and Digital Business 5, no. 2 (May 29, 2026): 5396–5403. Accessed October 10, 2026. https://journal.ilmudata.co.id/index.php/RIGGS/article/view/9389.