NGC 2242 (Chinese Wikipedia)
Analysis of information sources in references of the Wikipedia article "NGC 2242" in Chinese language version.
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books.google.com
- Torres-Peimbert (Editor), Silvia. Planetary Nebulae: Proceedings of the 131st Symposium of the International Astronomical Union, Held in Mexico City, Mexico, October 5–9, 1987. Dordrecht, The Netherlands: Kluwer Academic Publishers. 1989: 62 [9 February 2018]. ISBN 978-0-7923-0003-8. （原始内容存档于2021-07-04）.
cseligman.com
- Celestial Atlas. Courtney Seligman. [2015-06-02]. （原始内容存档于2016-02-20）.
doi.org
- Shaw, Richard A; Bidelman, William P. NGC 2242 - A newly-discovered planetary nebula. Astronomy and Astrophysics. Jan 1987, 99: 27–30. Bibcode:1987PASP...99...27S. doi:10.1086/131951
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harvard.edu
ui.adsabs.harvard.edu
- Shaw, Richard A; Bidelman, William P. NGC 2242 - A newly-discovered planetary nebula. Astronomy and Astrophysics. Jan 1987, 99: 27–30. Bibcode:1987PASP...99...27S. doi:10.1086/131951 .
web.archive.org
- Celestial Atlas. Courtney Seligman. [2015-06-02]. （原始内容存档于2016-02-20）.
- Torres-Peimbert (Editor), Silvia. Planetary Nebulae: Proceedings of the 131st Symposium of the International Astronomical Union, Held in Mexico City, Mexico, October 5–9, 1987. Dordrecht, The Netherlands: Kluwer Academic Publishers. 1989: 62 [9 February 2018]. ISBN 978-0-7923-0003-8. （原始内容存档于2021-07-04）.