Synthesis and Characterization of Nickel Oxide Nanostructures for Electrochemical Analysis of Methotrexate. Pakistan Journal of Analytical & Environmental Chemistry, Pakistan, v. 22, n. 2, p. 273–279, 2021. DOI: 10.21743/pjaec/2021.12.06. Disponível em: https://pjaec.pk/index.php/pjaec/article/view/103. Acesso em: 5 nov. 2025.