@article{paperid:1029386,
author = {Kamel Mirmostafaee, Seyyed Alireza and Mahdavi, Mostafa},
title = {Approximately  orthogonal  additive set-valued mappings},
journal = {Kyungpook Mathematical Journal},
year = {2013},
volume = {4},
number = {53},
month = {November},
issn = {1225-6951},
pages = {639--646},
			numpages = {7},
keywords = {Set-valued mappings; orthogonal space; Hausdorff metric; Hyers-Ulam stability.},
}