DIMITROV, S. I. A tangent inequality over primes. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 75, n. 7, p. 904–919, 2023. DOI: 10.37863/umzh.v75i7.7184. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7184. Acesso em: 5 dec. 2025.