CHENG, J.; CHENG, D. Several conjectures about the existence of the ether. European Journal of Applied Sciences, [S. l.], v. 9, n. 6, p. 154–177, 2021. DOI: 10.14738/aivp.96.11240. Disponível em: https://journals.scholarpublishing.org/index.php/AIVP/article/view/11240. Acesso em: 26 may. 2022.