Cornelio, David Lopez. “Land Cover Types Differentiation through Normalized Difference Vegetation Index in the Lowland Rainforests of Papua New Guinea”. Jurnal Manajemen Hutan Tropika 17, no. 3 (1): 89-94. Accessed August 5, 2020. http://journal.ipb.ac.id/index.php/jmht/article/view/3981.