@article{FORUM_1997__9_2_141794,
     author = {Etienne Frochaux},
     title = {Non-trivial representations of the special relativitiy group.},
     journal = {Forum mathematicum},
     pages = {75--102},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     zbl = {0863.22005},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141794/}
}