Joost van Beusekom Faisal Shafait Thomas M. Breuel Image-Matching for Revision Detection in Printed Historical Documents. 507-516 2007 conf/dagm/2007 DAGM-Symposium http://dx.doi.org/10.1007/978-3-540-74936-3_51 db/conf/dagm/dagm2007.html#BeusekomSB07