@article {Dragomir2005,
 author="S.S. Dragomir",
 title={Bounds for the distance to finite-dimensional subspaces},
 journal="Bull. Austral. Math. Soc.",
 fjournal={Bulletin of the Australian Mathematical Society},
 volume="72",
 year="2005",
 number="3",
 pages="337--347",
 issn="0004-9727",
 coden="ALNBAB",
 language="English",
 date="17th January, 2005",
 classmath="46C05, 26D15 ",
 publisher={AMPAI, Australian Mathematical Society},
 url="http://www.austms.org.au/Publ/Bulletin/V72P3/723-5020-Dragomir/index.shtml",
 acknowledgement={},
 abstract={We establish upper bounds for the distance to finite-dimensional subspaces in inner product spaces and improve some generalisations of Bessel's inequality obtained by Boas, Bellman and Bombieri. Refinements of the Hadamard inequality for Gram determinants are also given. }
}