@article{JRAM_1983__339_152504,
     author = {Jean Ludwig},
     title = {Irreducible representations of exponential solvable {Lie} groups and operators with smooth kernels.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--26},
     publisher = {mathdoc},
     volume = {339},
     year = {1983},
     zbl = {0492.22007},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1983__339_152504/}
}