R. B. MISHRA; S. M. W. AHMAD. Gauge Unification of Fundamental Forces: the Story of Success. Journal of International Academy of Physical Sciences, [S. l.], v. 1, n. 1-2, p. 1–11, 1997. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/96. Acesso em: 2 may. 2024.