The author gives a new simple proof of monotonicity of the generalized extended mean values introduced by F. Qi.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm99-2-5, author = {Alfred Witkowski}, title = {Monotonicity of generalized weighted mean values}, journal = {Colloquium Mathematicae}, volume = {100}, year = {2004}, pages = {203-206}, zbl = {1051.26021}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm99-2-5} }
Alfred Witkowski. Monotonicity of generalized weighted mean values. Colloquium Mathematicae, Tome 100 (2004) pp. 203-206. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm99-2-5/