OJEDA-CASTANEDA, J.; LEDESMA, S.; GOMEZ-SARABIA, C. M. Tunable apodizers and tunable focalizers using helical pairs. Photonics Letters of Poland, [S. l.], v. 5, n. 1, p. pp. 20–22, 2013. DOI: 10.4302/photon. lett. pl.v5i1.383. Disponível em: http://photonics.pl/PLP/index.php/letters/article/view/5-8. Acesso em: 23 sep. 2023.