Amihood Amir Tzvika Hartman Oren Kapah B. Riva Shalom Dekel Tsur 50-61 2007 conf/spire/2007 SPIRE http://dx.doi.org/10.1007/978-3-540-75530-2_5 db/conf/spire/spire2007.html#AmirHKST07