Below we list some external links, which appear relevant to us. These external sites are neither maintained nor endorsed by the Laboratory for High Energy Astrophysics. HEA Lab declines any responsibility for their contents and operation.

• Department of Theoretical Astrophysics of Ioffe Physical-Technical Institute of the Russian Academy of Sciences
• Experimental Astrophiscs Laboratory of Ioffe Physical-Technical Institute
• Laboratory of Quantum Heterostructures of Ioffe Physical-Technical Institute
• Space Research Institute of RAS
• PAMELA Project
• INTEGRAL gamma-ray observatory (INTEGRAL page on ESA site)
• High Energy Astrophysics Disivion of the Space Research Organization of the Netherlands
• Le Laboratoire Univers et Particules de Montpellier
• The AstroParticle and Cosmology laboratory of the University Paris-Diderot
• Department of Astronomy & Astrophysics of Pennsylvania State University
• Harvard-Smithsonian Center for Astrophysics
• Physics Department of the North Carolina State University
• Physics Department of the Stanford University
• Department of Astronomy at the University of Florida
• Department of Astronomy & Astrophysics of Columbia University
• School of Cosmic Physics of Dublin Institute for Advanced Studies
• Osservatorio Astronomico di Palermo