@article{souza_camargo_2019,  title={COMPARISON OF GNSS INDICES, IONOSONDES AND ALL-SKY IMAGERS IN MONITORING THE IONOSPHERE IN BRAZIL DURING QUIET AND DISTURBED DAYS},  volume={25},  ISSN={1982-2170},  url={https://doi.org/10.1590/s1982-21702019000S00005},  DOI={10.1590/s1982-21702019000S00005},  number={spe},  journal={Boletim de Ciências Geodésicas},  publisher={Universidade Federal do Paraná},  author={Souza, Ana Lucia Christovam de and Camargo, Paulo de Oliveira},  year={2019},  pages={e2019s005} }