@article{muntz_1978,  title={A penetração de luz nas águas de rios amazônicos},  volume={8},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921978084613},  DOI={10.1590/1809-43921978084613},  number={4},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  author={Muntz, W. R. A.},  year={1978},  month={Dec},  pages={613–619} }