Sites de busca
- Core: https://core.ac.uk
- Internet Archive: https://archive.org
- Refseek: https://www.refseek.com
- Worldcat: https://www.worldcat.org/pt
- Scilit: https://www.scilit.net
- Springer Link: https://link.springer.com
- Bioline: http://www.bioline.org.br
- Repec: http://repec.org
- Science.gov: https://www.science.gov
- BASE: https://www.base-search.net
