@article{10_4064_cm93_1_1,
     author = {Bing Xu and Weinian Zhang},
     title = {Hyers{\textendash}Ulam stability
 for a nonlinear iterative equation},
     journal = {Colloquium Mathematicum},
     pages = {1--9},
     publisher = {mathdoc},
     volume = {93},
     number = {1},
     year = {2002},
     doi = {10.4064/cm93-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm93-1-1/}
}