@article{01334843, title = {A new proof of monotonicity for extended mean values.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {22}, year = {1999}, pages = {417-421}, doi = {10.1155/S0161171299224179}, zbl = {0935.26015}, language = {en}, url = {http://dml.mathdoc.fr/item/01334843} }
Qi, Feng; Xu, Sen-Lin; Debnath, Lokenath. A new proof of monotonicity for extended mean values.. International Journal of Mathematics and Mathematical Sciences, Tome 22 (1999) pp. 417-421. doi : 10.1155/S0161171299224179. http://gdmltest.u-ga.fr/item/01334843/