Kepler, S. O.; Koester, D.; Ourique, G. A white dwarf with an oxygen atmosphere. Science. 31 March 2016, 352 (6281): 67–69. PMID 27034367. doi:10.1126/science.aad6705.
Kepler, S. O.; Koester, D.; Ourique, G. A white dwarf with an oxygen atmosphere. Science. 31 March 2016, 352 (6281): 67–69. PMID 27034367. doi:10.1126/science.aad6705.