@article{custódio_silva_santos_2021,  title={Relationship between photosynthetically active radiation and global radiation in Petrolina and Brasília, Brazil},  volume={25},  ISSN={1415-4366},  url={https://doi.org/10.1590/1807-1929/agriambi.v25n9p612-619},  DOI={10.1590/1807-1929/agriambi.v25n9p612-619},  number={9},  journal={Revista Brasileira de Engenharia Agrícola e Ambiental},  publisher={Unidade Acadêmica de Engenharia Agrícola},  author={Custódio, Lady L. M. and Silva, Bernardo B. da and Santos, Carlos A. C. dos},  year={2021},  month={Sep},  pages={612–619} }