GAFEL, Sukina T. Modes Analysis in Step Index Fibers. University of Thi-Qar Journal of Science, University of Thi-Qar, Thi-Qar, Iraq, v. 4, n. 4, p. 28–32, 2014. DOI: 10.32792/utq/utjsci/v4i4.661. Disponível em: http://mail.jsci.utq.edu.iq/index.php/main/article/view/661.. Acesso em: 11 apr. 2025.