Bhatia, RajendraDavis, ChandlerFuad, Kittaneh2014-03-262014-03-261991Aequationes Mathematicae, v 41, p 70-78http://hdl.handle.net/10263/5841enSome inqualities for communicatorsSpectral variationSome inqualities for communicators and an application to spectral variationArticle