Setiawan, J.; Klement, R. J.; Henning, T.; Rix, H.-W.; Rochau, B.; Rodmann, J.; Schulze-Hartung, T. (2010). “A Giant Planet Around a Metal-Poor Star of Extragalactic Origin”. Science330 (6011): 1642–1644. doi:10.1126/science.1193342. ISSN0036-8075.
Jones, M. I.; Jenkins, J. S. (2014). “No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP 13044”. Astronomy & Astrophysics562: A129. doi:10.1051/0004-6361/201322132. ISSN0004-6361.
Setiawan, J.; Klement, R. J.; Henning, T.; Rix, H.-W.; Rochau, B.; Rodmann, J.; Schulze-Hartung, T. (2010). “A Giant Planet Around a Metal-Poor Star of Extragalactic Origin”. Science330 (6011): 1642–1644. doi:10.1126/science.1193342. ISSN0036-8075.
Jones, M. I.; Jenkins, J. S. (2014). “No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP 13044”. Astronomy & Astrophysics562: A129. doi:10.1051/0004-6361/201322132. ISSN0004-6361.