@article{JRAM_1994__448_153602,
     author = {Jimmie D. Lawson},
     title = {Polar and {Ol'shanskii} decompositions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {191--219},
     publisher = {mathdoc},
     volume = {448},
     year = {1994},
     zbl = {0786.22012},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1994__448_153602/}
}