Geisler, Doug et al. (September 2007), “Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo”, The Publications of the Astronomical Society of the Pacific119 (859): 939–961, arXiv:0708.0570, Bibcode: 2007PASP..119..939G, doi:10.1086/521990.
D. I. Dinescu, S. R. Majewski, T. M. Girard, K. M. Cudworth (2000). “The Absolute Proper Motion of Palomar 12: A Case for Tidal Capture from the Sagittarius Dwarf Spheroidal Galaxy”. The Astronomical Journal120 (4): 1892-1905. arXiv:astro-ph/0006314. Bibcode: 2000astro.ph..6314D. doi:10.1086/301552.
Geisler, Doug et al. (September 2007), “Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo”, The Publications of the Astronomical Society of the Pacific119 (859): 939–961, arXiv:0708.0570, Bibcode: 2007PASP..119..939G, doi:10.1086/521990.
Abell, George O. (1955). “Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey”. Publications of the Astronomical Society of the Pacific67 (397): 258. Bibcode: 1955PASP...67..258A. doi:10.1086/126815.
D. I. Dinescu, S. R. Majewski, T. M. Girard, K. M. Cudworth (2000). “The Absolute Proper Motion of Palomar 12: A Case for Tidal Capture from the Sagittarius Dwarf Spheroidal Galaxy”. The Astronomical Journal120 (4): 1892-1905. arXiv:astro-ph/0006314. Bibcode: 2000astro.ph..6314D. doi:10.1086/301552.
Geisler, Doug et al. (September 2007), “Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo”, The Publications of the Astronomical Society of the Pacific119 (859): 939–961, arXiv:0708.0570, Bibcode: 2007PASP..119..939G, doi:10.1086/521990.
Abell, George O. (1955). “Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey”. Publications of the Astronomical Society of the Pacific67 (397): 258. Bibcode: 1955PASP...67..258A. doi:10.1086/126815.
D. I. Dinescu, S. R. Majewski, T. M. Girard, K. M. Cudworth (2000). “The Absolute Proper Motion of Palomar 12: A Case for Tidal Capture from the Sagittarius Dwarf Spheroidal Galaxy”. The Astronomical Journal120 (4): 1892-1905. arXiv:astro-ph/0006314. Bibcode: 2000astro.ph..6314D. doi:10.1086/301552.