@article{IM_1978__47_142578,
     author = {Masaki Kashiwara and Mich\`ele Vergne},
     title = {The {Campbell-Hausdorff} {Formula} and {Invariant} {Hyperfunctions.}},
     journal = {Inventiones mathematicae},
     pages = {249--272},
     publisher = {mathdoc},
     volume = {47},
     year = {1978},
     zbl = {0404.22012},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__47_142578/}
}