Fontes: https://www.iflscience.com/physics/mathematics-reveals-time-travel-is-logically-possible-but-not-how-to-do-it/ https://www.uq.edu.au/news/article/2020/09/young-physicist-squares-numbers%E2%80%99-time-travel Artigo científico: https://iopscience.iop.org/article/10.1088/1361-6382/aba4bc/pdf