SYAHPUTRA, A. R.; NURKHOIRY, R. .; AMALIA, R.; PRIMA SANI NASUTION, Z. . Production and Income Risk of RSPO Certified and Non-Certified Oil Palm Smallholders . Jurnal Penelitian Kelapa Sawit, [S. l.], v. 32, n. 3, p. 164–175, 2024. DOI: 10.22302/iopri.jur.jpks.v32i3.265. Disponível em: https://jurnalkelapasawit.iopri.org/index.php/jpks/article/view/265. Acesso em: 4 sep. 2026.