Thomas Kahlisch Matthias Leopold Christian Waldvogel DaCapo, a Project on Transforming Ink Printed to Braille Notes Semi-automatically: The Project's Current State. 224-227 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3118&spage=224 2004 conf/icchp/2004 ICCHP db/conf/icchp/icchp2004.html#KahlischLW04