IRAWAN, Wien Setya Budhi; SUHENDANG, Endang; MATANGARAN, Juang Rata. Model Penduga Produksi Kopal. Jurnal Manajemen Hutan Tropika, Bogor, INA, v. 13, n. 3, p. 166–171, 2011. Disponível em: https://journal.ipb.ac.id/jmht/article/view/4004. Acesso em: 13 jan. 2026.