Mary Ellen Bock Concettina Guerra Identifying Flat Regions and Slabs in Protein Structures. 83-97 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2666&spage=83 2003 conf/msps/2003 Mathematical Methods for Protein Structure Analysis and Design db/conf/msps/msps2003.html#BockG03