Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1985__43_1_114496, author = {Beitia, Maria Asunci\'on}, title = {Matrices which commute with a given matrix upon a subspace}, journal = {Portugaliae mathematica}, pages = {167--178}, publisher = {mathdoc}, volume = {43}, number = {1}, year = {1985}, mrnumber = {0875065}, zbl = {0579.15017}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114496/} }
Beitia, Maria Asunción. Matrices which commute with a given matrix upon a subspace. Portugaliae mathematica, Tome 43 (1985) no. 1, pp. 167-178. http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114496/