@article{JRAM_1987__373_152888,
     author = {Hiroshi Ito},
     title = {A function on the upper half space which is analogous to the imaginary part of log ... (z).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {148--165},
     publisher = {mathdoc},
     volume = {373},
     year = {1987},
     zbl = {0601.10021},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__373_152888/}
}