Samsuri, S., I. N. S. Jaya, C. Kusmana, and K. Murtilaksono. “Restoration Priority Index Development of Degraded Tropical Forest Landscape in Batang Toru Watershed, North Sumatera Indonesia”. BIOTROPIA, vol. 21, no. 2, Nov. 2014, pp. 111-24, doi:10.11598/btb.2014.21.2.394.