James R. Cordy, Katsuro Inoue, Stanislaw Jarzabek, Rainer Koschke: Proceeding of the 5th ICSE International Workshop on Software Clones, IWSC 2011, Waikiki, Honolulu, HI, USA, May 23, 2011. ACM 2011, ISBN 978-1-4503-0588-4