A Cosmological Aspect of A Higher Order Theory of Gravitation. Journal of International Academy of Physical Sciences, [S. l.], v. 5, n. 1-4, p. 77–80, 2001. Disponível em: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/743. Acesso em: 23 oct. 2026.