Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. 127 (4). ss. 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
G. de Marchi; M. Clampin; L. Greggio; C. Leitherer; A. Nota; M. Tosi. (1997). "The Structure of the Super--Star Clusters in NGC 1569 from HST WFPC2 Images". Astrophysical Journal Letters. 479 (1). ss. L27-L30. Bibcode:1997ApJ...479L..27D. doi:10.1086/310579.
Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. 127 (4). ss. 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
G. de Marchi; M. Clampin; L. Greggio; C. Leitherer; A. Nota; M. Tosi. (1997). "The Structure of the Super--Star Clusters in NGC 1569 from HST WFPC2 Images". Astrophysical Journal Letters. 479 (1). ss. L27-L30. Bibcode:1997ApJ...479L..27D. doi:10.1086/310579.