@article{paperid:102974, author = {Sal Moslehian, Mohammad and Th.M Rassias}, title = {Orthogonal stability of additive type equations}, journal = {Aequationes Mathematicae}, year = {2007}, volume = {73}, number = {3}, month = {February}, issn = {0001-9054}, pages = {249--259}, numpages = {10}, keywords = {a}, }