Pritzl, Barton J.; Armandroff, Taft E.; Jacoby, George H.; Da Costa, G. S. (May 2005). «The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda I and Andromeda III». The Astronomical Journal129 (5): 2232-2256. Bibcode:2005AJ....129.2232P. arXiv:astro-ph/0501083. doi:10.1086/428372.
Pritzl, Barton J.; Armandroff, Taft E.; Jacoby, George H.; Da Costa, G. S. (May 2005). «The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda I and Andromeda III». The Astronomical Journal129 (5): 2232-2256. Bibcode:2005AJ....129.2232P. arXiv:astro-ph/0501083. doi:10.1086/428372.
Pritzl, Barton J.; Armandroff, Taft E.; Jacoby, George H.; Da Costa, G. S. (May 2005). «The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda I and Andromeda III». The Astronomical Journal129 (5): 2232-2256. Bibcode:2005AJ....129.2232P. arXiv:astro-ph/0501083. doi:10.1086/428372.