Sulistiyono, Nurdin, JayaI Nengah Surati, PrasetyoLilik Budi, and Tatang Tiryana. 2015. “Spatial Model of Deforestation in Sumatra Islands Using Typological Approach”. Jurnal Manajemen Hutan Tropika 21 (3). Bogor, INA, 99-109. https://doi.org/10.7226/jtfm.21.3.99.