SHASHIKANT SINGH, DR. NARENDRA KUMAR. Unification of Fundamental Forces: Strengths and Limitations of Leading Quantum Gravity Approaches. International Journal of Engineering Science & Humanities, [S. l.], v. 10, n. 3, p. 47–61, 2020. Disponível em: https://www.ijesh.com/j/article/view/706. Acesso em: 30 mar. 2026.