@article{MS2_1982__51_166817,
     author = {Gerd Wittstock and Lothar M. Schmitt},
     title = {Characterisation of matrix-ordered standard forms of {W*-algebras.}},
     journal = {Mathematica Scandinavica},
     pages = {241--260},
     year = {1982},
     volume = {51},
     zbl = {0514.46039},
     url = {http://geodesic.mathdoc.fr/item/MS2_1982__51_166817/}
}