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References
- ↑ Kepler de Souza Oliveira Filho Archived 2015-12-08 at the Wayback Machine . Brazilian Academy of Sciences. Retrieved 2 December 2015.
- ↑ "Press release: Astronomers find most stable optical clock in the heavens | McDonald Observatory". Mcdonald Observatory. 1 December 2005.
- ↑ Diretoria: Biênio 2014/2016 Archived 2015-12-08 at the Wayback Machine (in Portuguese). Sociedade Brasileira de Astronomia. Retrieved 2 December 2015.
- ↑ "AURA Directory". Association of Universities for Research in Astronomy . Retrieved 2 December 2015.
- ↑ Kepler, S. O.; Koester, D.; Ourique, G. (31 March 2016). "A white dwarf with an oxygen atmosphere". Science. 352 (6281): 67–69. Bibcode:2016Sci...352...67K. doi: 10.1126/science.aad6705 . PMID 27034367.
- ↑ "Astronomia e Astrofísica" . Retrieved 7 June 2016.
