ROMANIUK, Ryszard S. Geometry design in rerfractive capillary optical fibers. Photonics Letters of Poland, [S. l.], v. 2, n. 2, p. pp. 64–66, 2010. DOI: 10.4302/photon. lett. pl.v2i2.113. Disponível em: http://photonics.pl/PLP/index.php/letters/article/view/2-22. Acesso em: 5 may. 2024.