MAHMOOD, Mashaan Attalla. Mathematical Approximation for Modeling the Photonic Crystal Fibers. Al-Mustansiriyah Journal of Science, Baghdad, Iraq, v. 29, n. 4, p. 117–121, 2019. DOI: 10.23851/mjs.v29i4.424. Disponível em: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/424.. Acesso em: 6 may. 2024.