CANTONI, Antonio; VO, Ba-Ngu; TEO, Kok Lay. An introduction to envelope constrained filter design. Journal of Telecommunications and Information Technology, [S. l.], v. 5, n. 3, p. 3–14, 2001. DOI: 10.26636/jtit.2001.3.73. Disponível em: https://jtit.pl/jtit/article/view/73. Acesso em: 8 oct. 2025.