@article{PM_1992_1992_1_a44,
     author = {G\'omez, Francisco},
     title = {Clases algebraicas caracter{\'\i}sticas para matrices idempotentes.},
     journal = {Publicacions matem\`atiques},
     pages = {601-608},
     publisher = {mathdoc},
     volume = {36},
     number = {2A},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1992_1992_1_a44/}
}