Kerber, F.; Mignani, R. P.; Guglielmetti, F.; Wicenec, A. (September 2003). ”Galactic Planetary Nebulae and their central stars. I. An accurate and homogeneous set of coordinates”. Astronomy and Astrophysics 408 (3): sid. 1029–1035. doi:10.1051/0004-6361:20031046. Bibcode: 2003A&A...408.1029K.
Stanghellini, L.; Shaw, R. A.; Villaver, E. (2008). ”The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale”. The Astrophysical Journal 689: sid. 194–202. doi:10.1086/592395. Bibcode: 2008ApJ...689..194S.
Chornay, N.; Walton, N. A.; Jones, D.; Boffin, H. M. J.; Rejkuba, M.; Wesson, R. (2021). ”Towards a more complete sample of binary central stars of planetary nebulae with Gaia”. Astronomy & Astrophysics 648: sid. A95. doi:10.1051/0004-6361/202140288. Bibcode: 2021A&A...648A..95C.
Kerber, F.; Mignani, R. P.; Guglielmetti, F.; Wicenec, A. (September 2003). ”Galactic Planetary Nebulae and their central stars. I. An accurate and homogeneous set of coordinates”. Astronomy and Astrophysics 408 (3): sid. 1029–1035. doi:10.1051/0004-6361:20031046. Bibcode: 2003A&A...408.1029K.
Stanghellini, L.; Shaw, R. A.; Villaver, E. (2008). ”The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale”. The Astrophysical Journal 689: sid. 194–202. doi:10.1086/592395. Bibcode: 2008ApJ...689..194S.
Chornay, N.; Walton, N. A.; Jones, D.; Boffin, H. M. J.; Rejkuba, M.; Wesson, R. (2021). ”Towards a more complete sample of binary central stars of planetary nebulae with Gaia”. Astronomy & Astrophysics 648: sid. A95. doi:10.1051/0004-6361/202140288. Bibcode: 2021A&A...648A..95C.