RANU SHARMA; BHAGYASHRI A. DEOLE; SMITA VERMA. Some Properties of Tri-b Open Sets in Tri Topological Space. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 2 - A, p. 279–287, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/673. Acesso em: 22 jul. 2024.