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- [42] A SPATIALLY RESOLVED PHOTODISSOCIATION REGION IN THE PLANETARY-NEBULA NGC-7027 ASTRONOMICAL JOURNAL, 1993, 105 (01): : 250 - +
- [43] Spectroscopic observations of the planetary nebula NGC 6818 ASTROPHYSICAL JOURNAL, 1999, 514 (02): : 878 - 894
- [44] SOFIA observations of the planetary nebula NGC 7009 PLANETARY NEBULAE: AN EYE TO THE FUTURE, 2012, (283): : 67 - +
- [47] A deep UV-blue planetary nebula template spectrum from NGC 7027 PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSE, 2003, (209): : 337 - 338
- [48] FAST Detection of OH Emission in the Carbon-rich Planetary Nebula NGC 7027 ASTROPHYSICAL JOURNAL, 2024, 972 (01):
- [49] ABSOLUTE SPECTROPHOTOMETRY OF PLANETARY NEBULA NGC 7027 IN SPECTRAL INTERVAL LAMBDAL 7000 - 10400 A ASTRONOMICHESKII ZHURNAL, 1973, 50 (05): : 962 - 967
- [50] 0.8-1.6 MICRON SPECTROSCOPY OF THE PLANETARY-NEBULA NGC-7027 ASTROPHYSICAL JOURNAL, 1992, 384 (02): : 536 - 544