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Melissa L. Graham; David J. Sand; Dennis Zaritsky; Chris J. Pritchet (13 May 2015). "Confirmation of Hostless Type Ia Supernovae Using Hubble Space Telescope Imaging". The Astrophysical Journal. 807: 83. arXiv:1505.03407. Bibcode:2015ApJ...807...83G. doi:10.1088/0004-637X/807/1/83.
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Melissa L. Graham; David J. Sand; Dennis Zaritsky; Chris J. Pritchet (13 May 2015). "Confirmation of Hostless Type Ia Supernovae Using Hubble Space Telescope Imaging". The Astrophysical Journal. 807: 83. arXiv:1505.03407. Bibcode:2015ApJ...807...83G. doi:10.1088/0004-637X/807/1/83.