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@article{MS2_1980__47_166727, author = {Gunnar Sparr}, title = {A new proof of {L\"owner's} theorem on monotone matrix functions.}, journal = {Mathematica Scandinavica}, pages = {266--274}, publisher = {mathdoc}, volume = {47}, year = {1980}, zbl = {0433.15012}, url = {http://geodesic.mathdoc.fr/item/MS2_1980__47_166727/} }
Gunnar Sparr. A new proof of Löwner's theorem on monotone matrix functions.. Mathematica Scandinavica, Tome 47 (1980), pp. 266-274. http://geodesic.mathdoc.fr/item/MS2_1980__47_166727/