BIERMANN, P. L.; HARMS, B. C. Gravitational Waves and Dark Energy. Acta Polytechnica CTU Proceedings, [S. l.], v. 1, n. 1, p. 20–26, 2014. DOI: 10.14311/APP.2014.01.0020. Disponível em: https://ojs.cvut.cz/ojs/index.php/APP/article/view/2340. Acesso em: 2 may. 2024.