Samsuri, Samsuri, I Nengah Surati Jaya, Cecep Kusmana, and Kukuh Murtilaksono. 2014. “Restoration Priority Index Development of Degraded Tropical Forest Landscape in Batang Toru Watershed, North Sumatera Indonesia”. BIOTROPIA - The Southeast Asian Journal of Tropical Biology 21 (2):111-24. https://doi.org/10.11598/btb.2014.21.2.394.