Topasna, G. A.; Kaltcheva, N. T. et al. (2018). «Interstellar polarization and extinction towards the young open cluster NGC 1502». Astronomy and Astrophysics615: 16. Bibcode:2018A&A...615A.166T. doi:10.1051/0004-6361/201731903. A166.
Grocholski, Aaron J.; Aloisi, Alessandra; van der Marel, Roeland P.; Mack, Jennifer et al. (2008). «A New Hubble Space Telescope Distance to NGC 1569: Starburst Properties and IC 342 Group Membership». Astrophysical Journal Letters686 (2): L79-L82. Bibcode:2008ApJ...686L..79G. arXiv:0808.0153. doi:10.1086/592949.
Grocholski, Aaron J.; Aloisi, Alessandra; van der Marel, Roeland P.; Mack, Jennifer et al. (2008). «A New Hubble Space Telescope Distance to NGC 1569: Starburst Properties and IC 342 Group Membership». Astrophysical Journal Letters686 (2): L79-L82. Bibcode:2008ApJ...686L..79G. arXiv:0808.0153. doi:10.1086/592949.
Topasna, G. A.; Kaltcheva, N. T. et al. (2018). «Interstellar polarization and extinction towards the young open cluster NGC 1502». Astronomy and Astrophysics615: 16. Bibcode:2018A&A...615A.166T. doi:10.1051/0004-6361/201731903. A166.
Grocholski, Aaron J.; Aloisi, Alessandra; van der Marel, Roeland P.; Mack, Jennifer et al. (2008). «A New Hubble Space Telescope Distance to NGC 1569: Starburst Properties and IC 342 Group Membership». Astrophysical Journal Letters686 (2): L79-L82. Bibcode:2008ApJ...686L..79G. arXiv:0808.0153. doi:10.1086/592949.