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@article{PORMA_1987__44_3_115587, author = {Silva, Fernando C.}, title = {Matrices with prescribed characteristic polynomial and submatrices}, journal = {Portugaliae mathematica}, pages = {261--264}, publisher = {mathdoc}, volume = {44}, number = {3}, year = {1987}, mrnumber = {0911840}, zbl = {0656.15002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1987__44_3_115587/} }
Silva, Fernando C. Matrices with prescribed characteristic polynomial and submatrices. Portugaliae mathematica, Tome 44 (1987) no. 3, pp. 261-264. http://geodesic.mathdoc.fr/item/PORMA_1987__44_3_115587/