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- [24] The IUE spectrum of the ''O VI sequence'' planetary nebula IC 2003 ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1997, 109 (02): : 481 - 488
- [26] The ISO-SWS spectrum of planetary nebula NGC 7027 Astronomy and Astrophysics, 2001, 367 (03): : 949 - 958
- [27] The ISO-SWS spectrum of planetary nebula NGC 7027 ASTRONOMY & ASTROPHYSICS, 2001, 367 (03): : 949 - 958
- [29] The IUE and Hubble Space Telescope GHRS spectrum of the "hybrid"/PG 1159-type central star of the planetary nebula NGC 7094 ASTROPHYSICAL JOURNAL, 2000, 542 (02): : 957 - 963