BOSCAGGIN, A.; DAMBROSIO, W.; PAPINI, D. Periodic solutions to relativistic Kepler problems: a variational approach. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], p. 33, 2022. DOI: 10.2422/2036-2145.202205_016. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/5900. Acesso em: 7 jun. 2025.