Media type: E-Article Title: Smoothing algorithms and high-order singularities in gravitational lensing Contributor: Li, Guo-Liang [Author]; Bartelmann, Matthias [Author] Published: June 25, 2006 Published in: The astrophysical journal ; 652(2006), 1, Seite 43-55 Language: English DOI: 10.1086/507695 Identifier: Origination: Footnote: Access State: Open Access