P. RAJALAKSHMI; S. SELVAM. Compactness in Smooth Bitopological Spaces. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 1 - D, p. 801–807, 2018. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1143. Acesso em: 17 dec. 2025.