%0 Journal Article %A Myers, Donald E. %T Another proof of the differentiability of a matrix %J Portugaliae mathematica %D 1972 %P 119-120 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1972__31_2_115168/ %G en %F PORMA_1972__31_2_115168