МАТНЯК, С. Matnyak S.V. Proof of the correctness of the Piemann’s hypothesis. Problems of Tribology, [S. l.], v. 68, n. 2, p. 43–49, 2014. Disponível em: https://tribology.khmnu.edu.ua/index.php/ProbTrib/article/view/136. Acesso em: 31 jul. 2025.