IQBAL, P.; AFTAB , K. Study of Complexation Behaviour of Lignite Extracted Humic Acid with Some Divalent Cations. Engineering Science Letter, [S. l.], v. 2, n. 03, p. 99–104, 2023. DOI: 10.56741/esl.v2i03.431. Disponível em: https://journal.iistr.org/index.php/ESL/article/view/431. Acesso em: 6 jul. 2024.