@article{JCA_1995_2_1-2_a11,
     author = {A. S. Lewis},
     title = {The {Convex} {Analysis} of {Unitarily} {Invariant} {Matrix} {Functions}},
     journal = {Journal of convex analysis},
     pages = {173--184},
     publisher = {mathdoc},
     volume = {2},
     number = {1-2},
     year = {1995},
     url = {http://geodesic.mathdoc.fr/item/JCA_1995_2_1-2_a11/}
}