Spectral studies of Nickel(II) and Chromium(III). Baghdad Science Journal, Iraq, Baghdad, v. 2, n. 2, p. 289–294, 2005. DOI: 10.21123/bsj.2005.615. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/615.. Acesso em: 19 jun. 2025.