Simanjuntak, C. 2012. Keragaman dan struktur kumpulan ikan di anak sungai-anak sungai Sopokomil, Dairi, Sumatera Utara [Fish diversity and assemblage structure in tributaries of Sopokomil River, Dairi, North Sumatra]. Jurnal Iktiologi Indonesia. 12, 2 (Dec. 2012), 155-172. DOI:https://doi.org/10.32491/jii.v12i2.121.