• The Centre for Astrophysics and Cosmology at the University of Iceland
• The Dark Cosmology Centre at the Niels Bohr Institute
• The Astrophysics and Gravitation Group at the University of Waterloo
• Perimeter Institute for Theoretical Physics
• Canadian Institute for Theoretical Astrophysics
• Max Planck Institute for Astrophysics
• Shanghai Astronomical Observatory
• The Nuclear Sciences Institute and the Astronomy Institute at the National Autonomous University of Mexico
• ADS Abstract Service