@article{10_4153_CJM_1969_108_6,
     author = {Nikolai, Paul J.},
     title = {Mean {Value} and {Limit} {Theorems} for {Generalized} {Matrix} {Functions}},
     journal = {Canadian journal of mathematics},
     pages = {982--991},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-108-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-108-6/}
}