Daniel B. Zucker, Alexei Y. Kniazev, David Martinez-Delgado, Eric F. Bell, Hans-Walter Rix, Eva K. Grebel, Jon A. Holtzman, Rene A. M. Walterbos, Constance M. Rockosi, Donald G. York, J. C. Barentine, Howard Brewington, J. Brinkmann, Michael Harvanek, S. J. Kleinman, Jurek Krzesinski, Dan Long, Eric H. Neilsen, Jr., Atsuko Nitta, Stephanie A. Snedden: Andromeda X, A New Dwarf Spheroidal Satellite of M31: Photometry. In: Astrophysical Journal. 659. Jahrgang, 2007, S.L21-L24, doi:10.1086/516748, arxiv:astro-ph/0601599.
Daniel B. Zucker, Alexei Y. Kniazev, David Martinez-Delgado, Eric F. Bell, Hans-Walter Rix, Eva K. Grebel, Jon A. Holtzman, Rene A. M. Walterbos, Constance M. Rockosi, Donald G. York, J. C. Barentine, Howard Brewington, J. Brinkmann, Michael Harvanek, S. J. Kleinman, Jurek Krzesinski, Dan Long, Eric H. Neilsen, Jr., Atsuko Nitta, Stephanie A. Snedden: Andromeda X, A New Dwarf Spheroidal Satellite of M31: Photometry. In: Astrophysical Journal. 659. Jahrgang, 2007, S.L21-L24, doi:10.1086/516748, arxiv:astro-ph/0601599.