@article{paperid:1050156, author = {Zamani, Ali and Sal Moslehian, Mohammad}, title = {Approximate Roberts orthogonality}, journal = {Aequationes Mathematicae}, year = {2015}, volume = {89}, number = {3}, month = {October}, issn = {0001-9054}, pages = {529--541}, numpages = {12}, keywords = {Roberts orthogonality approximate orthogonality \({\varepsilon}\)-isometry orthogonality preserving mapping}, }