What if Einstein had not sent the letter to Roosevelt?. Hypothesis Historia Periodical, [S. l.], v. 3, n. 1, 2023. DOI: 10.34626/2184-9978/2023_vol3_n1_787. Disponível em: https://ojs.up.pt/index.php/hhp/article/view/787. Acesso em: 2 may. 2025.