%0 Journal Article %A Etienne Frochaux %T Non-trivial representations of the special relativitiy group. %J Forum mathematicum %D 1997 %P 75-102 %V 9 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141794/ %F FORUM_1997__9_2_141794