N. LALITHA; M. MURUGALINGAM. Properties of Q* SetsϮ. Journal of International Academy of Physical Sciences, [S. l.], v. 15, n. 5, p. 95–100, 2011. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/618. Acesso em: 19 may. 2024.