P ¹ NP: A Formal Proof. International Journal of Emerging Trends in Science and Technology, [S. l.], 2024. DOI: 10.18535/ijetst/v2024.04. Disponível em: https://www.ijetst.in/index.php/ijetst/article/view/1579. Acesso em: 24 oct. 2026.