@article{CM_1992__82_2_189_0,
     author = {Matumoto, Hisayosi},
     title = {$C^{-\infty }${-Whittaker} vectors corresponding to a principal nilpotent orbit of a real reductive linear {Lie} group, and wave front sets},
     journal = {Compositio Mathematica},
     pages = {189--244},
     publisher = {Kluwer Academic Publishers},
     volume = {82},
     number = {2},
     year = {1992},
     zbl = {0797.22005},
     language = {en},
     url = {http://www.numdam.org/item/CM_1992__82_2_189_0/}
}