Siahaan, Angely Agriani, and Ashar Hasairin. “Korelasi Kepadatan Lalu Lintas Terhadap Sulfur Dan Klorofil Lichens Di Patumbak, Deli Serdang”. Biocaster : Jurnal Kajian Biologi 6, no. 4 (October 27, 2026): 2128–2137. Accessed October 31, 2026. https://e-journal.lp3kamandanu.com/index.php/biocaster/article/view/1649.