@article{JRAM_1979__0307_0308_152107,
     author = {Richard Gabriel},
     title = {Matrizen mit maximaler {Diagonale} bei unit\"arer {Similarit\"at.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {31--52},
     publisher = {mathdoc},
     volume = {0307_0308},
     year = {1979},
     zbl = {0396.15010},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__0307_0308_152107/}
}