A Note on Approximations of Bi-continuous Cosine Families. Contemporary Mathematics , [S. l.], v. 6, n. 5, p. 7214–7222, 2025. DOI: 10.37256/cm.6520258411. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/8411. Acesso em: 24 dec. 2025.