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Massey, Philip (11 september 2001). ”The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations”. The Astronomical Journal "121" (2): ss. 1050. doi:10.1086/318769. Bibcode: 2001AJ....121.1050M.
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Egan, Michael P. (11 september 2002). ”An Infrared Ring Nebula around MSX5C G358.5391+00.1305: The True Nature of Suspected Planetary Nebula Wray 17-96 Determined via Direct Imaging and Spectroscopy”. The Astrophysical Journal "572" (1): ss. 288. doi:10.1086/340222. Bibcode: 2002ApJ...572..288E.