@article{MS2_1981__48_166735,
     author = {Henrik Stetkaer and Jacob Jacobsen},
     title = {Eigenspace representations of nilpotent lie groups.},
     journal = {Mathematica Scandinavica},
     pages = {41--55},
     year = {1981},
     volume = {48},
     zbl = {0456.22011},
     url = {http://geodesic.mathdoc.fr/item/MS2_1981__48_166735/}
}