|ORIGINAL ARTICLE||Publication URI: http://www.livingreviews.org/lrr-1998-12|
|Title||Gravitational Lensing in Astronomy|
|Date||accepted 28 August 1998, published 2 November 1998|
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|Date||accepted , published 31 August 2001|
|Changes||Section 4.2: corrected value for surface mass density.
Bibliography: corrected year of publication in Reference 202. Minor editorial revision of reference list (reference numbers have changed), URLs updated. For detailed description see here .