R. Klement, J. Setiawan, Thomas Henning, Hans-Walter Rix, Boyke Rochau, Jens Rodmann, Tim Schulze-Hartung et al.« The visitor from an ancient galaxy: A planetary companion around an old, metal-poor red horizontal branch star » () (DOI10.1017/S1743921311020059, Bibcode2011IAUS..276..121K, arXiv1011.4938) —IAU Symposium — « (ibid.) », dans The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution, vol. 276, p. 121–125
R. Klement, J. Setiawan, Thomas Henning, Hans-Walter Rix, Boyke Rochau, Jens Rodmann, Tim Schulze-Hartung et al.« The visitor from an ancient galaxy: A planetary companion around an old, metal-poor red horizontal branch star » () (DOI10.1017/S1743921311020059, Bibcode2011IAUS..276..121K, arXiv1011.4938) —IAU Symposium — « (ibid.) », dans The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution, vol. 276, p. 121–125
R. Klement, J. Setiawan, Thomas Henning, Hans-Walter Rix, Boyke Rochau, Jens Rodmann, Tim Schulze-Hartung et al.« The visitor from an ancient galaxy: A planetary companion around an old, metal-poor red horizontal branch star » () (DOI10.1017/S1743921311020059, Bibcode2011IAUS..276..121K, arXiv1011.4938) —IAU Symposium — « (ibid.) », dans The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution, vol. 276, p. 121–125