-
Mandrou P.
"The SIGMA mission". In Advances in Space Research, Proc. of 25th COSPAR meeting , 3, n. 10-12, p. 525-531, 1984.
-
Rivière G., J. Paul, and P. Mandrou.
"SIGMA : projet d’observatoire spatial à haute résolution angulaire pour les sources de rayons gamma". In Acta Astronautica, Proc. of 33rd Congress of the International Astronautical Federation (Paris - France, 1982), 11, n. 5, p. 251-262, 1984.
-
Roques J.P., and G. Debouzy.
"SIGMA : an imaging gamma-ray experiment". In Proc. of 14th International Symposium on Space Technology and Science (Tokyo - Japan, 1983), p. 1523-1527, 1984.