HOANG, N. V.; DAO, L. Q.; VAN, D. T.; HOA, P. L. Heavy metal contamination of soil based on pollution, geo-accumulation indices and enrichment factor in Phan Me coal mine area, Thai Nguyen province, Vietnam. Vietnam Journal of Earth Sciences, [S. l.], v. 42, n. 2, p. 105–117, 2020. DOI: 10.15625/0866-7187/42/2/14950. Disponível em: https://vjs.ac.vn/index.php/jse/article/view/14950. Acesso em: 20 may. 2022.