@article{10_4153_CJM_1971_028_6,
     author = {Powers, David L.},
     title = {On the {Differentials} of {Certain} {Matrix} {Functions}},
     journal = {Canadian journal of mathematics},
     pages = {282--286},
     year = {1971},
     volume = {23},
     number = {2},
     doi = {10.4153/CJM-1971-028-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-028-6/}
}