SALES, Paul Ryan L. et al. Validation of Two Extraction Methods for Human DNA from Cigarette Butts. Science Diliman: A Journal of Pure and Applied Sciences, [S.l.], v. 31, n. 1, june 2019. ISSN 2012-0818. Available at: <https://journals.upd.edu.ph/index.php/sciencediliman/article/view/6743>. Date accessed: 30 aug. 2025.