@article{05019253, title = {Invariance of the Cauchy mean-value expression with an application to the problem of representation of Cauchy means.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2005}, year = {2005}, pages = {2895-2912}, doi = {10.1155/IJMMS.2005.2895}, zbl = {1121.39021}, language = {en}, url = {http://dml.mathdoc.fr/item/05019253} }
Berrone, Lucio R. Invariance of the Cauchy mean-value expression with an application to the problem of representation of Cauchy means.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 2895-2912. doi : 10.1155/IJMMS.2005.2895. http://gdmltest.u-ga.fr/item/05019253/