@article{PORMA_1985__43_1_114490,
     author = {Vieira, Jo\~ao Carlos David},
     title = {On polynomial invariant chains of matrices and principal submatrices},
     journal = {Portugaliae mathematica},
     pages = {147--152},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1985},
     mrnumber = {0875062},
     zbl = {0624.15005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114490/}
}