@article{AIHPA_1973__18_1_39_0, author = {Angelopoulos, E.}, title = {On unitary irreducible representations of semidirect products with nilpotent normal subgroup}, journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique}, pages = {39--55}, year = {1973}, publisher = {Gauthier-Villars}, volume = {18}, number = {1}, mrnumber = {335682}, language = {en}, url = {https://www.numdam.org/item/AIHPA_1973__18_1_39_0/} }