ULLAH, Ehsan. HALF-FACTORIALITY IN SUBRINGS OF TRIGONOMETRIC POLYNOMIAL RINGS. Trends in Computational and Applied Mathematics, [S. l.], v. 14, n. 2, p. 173–186, 2013. DOI: 10.1590/S2179-84512013005000003. Disponível em: https://tema.sbmac.org.br/tema/article/view/579. Acesso em: 3 jul. 2024.