Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1981__256_163494, author = {Frank Hansen}, title = {Selfadjoint {Means} and {Operator} {Monotone} {Functions.}}, journal = {Mathematische Annalen}, pages = {29--36}, publisher = {mathdoc}, volume = {256}, year = {1981}, zbl = {0461.47009}, url = {http://geodesic.mathdoc.fr/item/MAN_1981__256_163494/} }
Frank Hansen. Selfadjoint Means and Operator Monotone Functions.. Mathematische Annalen, Tome 256 (1981), pp. 29-36. http://geodesic.mathdoc.fr/item/MAN_1981__256_163494/