Sampaio, Flávio André, Vinicius Silva, Luiz Neto, Tadeu Ferreira, Andrés Pablo Barbero, and Ricardo Ribeiro. “Highly Spectrally Efficient Discrete Multi-Tone Transmission over Step Index PMMA Optical Fibre for Short-Range Optical Communication”. Journal of Communication and Information Systems 33, no. 1 (August 9, 2018). Accessed September 16, 2019. https://jcis.sbrt.org.br/jcis/article/view/560.