R.C. AGRAWAL. A Note on Subtractive Abelian Loops. Journal of International Academy of Physical Sciences, [S. l.], v. 9, n. 1-4, p. 1–8, 2021. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/792. Acesso em: 11 may. 2025.