David Coeurjolly Frédéric Flin Olivier Teytaud Laure Tougne Multigrid Convergence and Surface Area Estimation. 101-119 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2616&spage=101 2002 conf/tfcv/2002 Theoretical Foundations of Computer Vision db/conf/tfcv/tfcv2002.html#CoeurjollyFTT02