MACHA, J. S.; SHINDE, S. N. Degree Square Subtraction Spectra and Energy. Journal of the Indonesian Mathematical Society, [S. l.], v. 28, n. 3, p. 259–271, 2022. DOI: 10.22342/jims.28.3.1007.259-271. Disponível em: https://jims-a.org/index.php/jimsa/article/view/1007. Acesso em: 20 may. 2024.