Convex Matrix Functions.
@article{1789, title = {Convex Matrix Functions}, journal = {CUBO, A Mathematical Journal}, volume = {4}, year = {2002}, language = {en}, url = {http://dml.mathdoc.fr/item/1789} }
Hansen, Frank. Convex Matrix Functions. CUBO, A Mathematical Journal, Tome 4 (2002) . http://gdmltest.u-ga.fr/item/1789/