@article{AM2_1985__29_137079,
     author = {Albert W. Marshall and Ingram Olkin},
     title = {Inequalities for the trace function.},
     journal = {Aequationes mathematicae},
     pages = {36--39},
     publisher = {mathdoc},
     volume = {29},
     year = {1985},
     zbl = {0585.15003},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137079/}
}