Andri LOPEZ. Collatz Conjecture Proved. Current Topics on Mathematics and Computer Science Vol. 2, [S. l.], p. 1–6, 2021. DOI: 10.9734/bpi/ctmcs/v2/9638D. Disponível em: https://stm.bookpi.org/CTMCS-V2/article/view/1773. Acesso em: 17 aug. 2026.