FREZZA, Fabrizio. The Optimum-efficiency Beam Multiplier for an Arbitrary Number of Output Beams and Power Distribution. Journal of Telecommunications and Information Technology, [S. l.], v. 69, n. 3, p. 94–98, 2017. DOI: 10.26636/jtit.2017.118617. Disponível em: https://www.jtit.pl/jtit/article/view/679. Acesso em: 13 oct. 2025.