Andreas Alpers Sara Brunetti On the Stability of Reconstructing Lattice Sets from X-rays Along Two Directions. 92-103 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3429&spage=92 2005 conf/dgci/2005 DGCI db/conf/dgci/dgci2005.html#AlpersB05