@article{JRAM_1987__377_152930,
     author = {Bruce Reznick},
     title = {A quantitative version of {Hurwitz'} theorem on the arithmetic-geometric inequality.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {108--112},
     publisher = {mathdoc},
     volume = {377},
     year = {1987},
     zbl = {0615.10028},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__377_152930/}
}