@article{JRAM_1993__439_153524,
     author = {Edward Kissin},
     title = {Representational indices of derivations of {C*-algebras} and representations of *-algebras on {Krein} spaces.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {71--92},
     publisher = {mathdoc},
     volume = {439},
     year = {1993},
     zbl = {0765.46057},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__439_153524/}
}