Carlos Vinhais Aurélio C. Campilho Ribcage Boundary Delineation in Chest X-ray Images. 59-67 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3212&spage=59 2004 conf/iciar/2004-2 ICIAR (2) db/conf/iciar/iciar2004-2.html#VinhaisC04