Gunawan, Ahyar, I Nengah Surati Jaya, and Muhammad Buce Saleh. 2010. “Quick Tecniques in Indentifying Open Area by the Use of Multi Spatial and Multidate Imageries”. Jurnal Manajemen Hutan Tropika 16 (2): 63-72. https://journal.ipb.ac.id/jmht/article/view/1962.