@article{coêlho_silva_2013,  title={A methodology for performance evaluation of LEDs based on ac small signal analysis},  volume={12},  ISSN={2179-1074},  url={https://doi.org/10.1590/S2179-10742013000200026},  DOI={10.1590/S2179-10742013000200026},  number={2},  journal={Journal of Microwaves, Optoelectronics and Electromagnetic Applications},  publisher={Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo},  author={Coêlho, Isnaldo J. Souza and Silva, James N. da},  year={2013},  month={Dec},  pages={580–593} }