@article{10_4064_sm186_3_6,
     author = {Sameer Chavan},
     title = {On operators close to isometries},
     journal = {Studia Mathematica},
     pages = {275--293},
     publisher = {mathdoc},
     volume = {186},
     number = {3},
     year = {2008},
     doi = {10.4064/sm186-3-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm186-3-6/}
}