California Institute of Technology: observational cosmology
Landau Institute for Theoretical Physics, Moscow: theoretical cosmology
Institute d’Astrophysique, Paris: X-ray clusters of galaxies
Sapienza University, Rome, University of Salento, Lecce, : LARES satellite mission, galactic halos
Laboratoire d’Astrophysique, Lausanne: astrophysical data analysis, gravitational lensing
