CHALIL, D.; BARUS, R. Analysis of Smallholders’ Progress in Implementing Sustainable Management in North Sumatra, Indonesia. Indonesian Journal of Agricultural Research, [S. l.], v. 1, n. 3, p. 246–259, 2019. DOI: 10.32734/injar.v1i3.677. Disponível em: https://idjpcr.usu.ac.id/InJAR/article/view/677. Acesso em: 10 sep. 2025.