1. 5Di Mauro, G.; Rasotto, M. Madakashira, H. K; Lara, M.; San-Juan J.F. "End-of-Life Disposal Concepts for Lagrange-Points andHEO Missions", FinalReport ESAcontract AO/1-7210/12/F/MOS,2014
2. 6http://www.esa.int/spaceinimages/Images/2008/01/Integral_artist_s_impression
3. 7http://www.esa.int/spaceinimages/Images/2002/08/Cluster_II