YAO, K. The Unification of Gravitational Field and Electromagnetic Field. European Journal of Applied Sciences, [S. l.], v. 9, n. 5, p. 272–288, 2021. DOI: 10.14738/aivp.95.10969. Disponível em: https://journals.scholarpublishing.org/index.php/AIVP/article/view/10969. Acesso em: 25 apr. 2024.