1. Small satellites home page, http://www.smallsatellites.org.
2. Space Systems Development Laboratory, Stanford University, http://ssdl.stanford.edu.
3. Surrey Space Centre, http://www.surreyspace.ac.uk.
4. F. Graziani, M. Ferrante, G.B. Palmerini, F. Santoni, P. Tortora, UNISAT program: a University Tool for Space Education, Proceedings of the 51st International Astronautical Congress, 2000, Rio de Janeiro, Brazil.
5. F. Graziani, M. Ferrante, G.B. Palmerini, F. Santoni, P. Tortora, C. Marchiori, Microsatellites projects for space education: the UNISAT experience, Proceedings of the 39th AIAA Aerospace Sciences Meeting and Exhibit, Paper 2001-0586, 2001, Reno, Nevada, USA.