Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1988__200_3_174027, author = {Richard Gabriel}, title = {Zur besten normalen {Approximation} komplexer {Matrizen} in der {Euklidischen} {Norm.}}, journal = {Mathematische Zeitschrift}, pages = {591--600}, publisher = {mathdoc}, volume = {200}, number = {3}, year = {1988}, zbl = {0648.15018}, url = {http://geodesic.mathdoc.fr/item/MZ_1988__200_3_174027/} }
Richard Gabriel. Zur besten normalen Approximation komplexer Matrizen in der Euklidischen Norm.. Mathematische Zeitschrift, Tome 200 (1988) no. 3, pp. 591-600. http://geodesic.mathdoc.fr/item/MZ_1988__200_3_174027/