Amihood Amir Tzvika Hartman Oren Kapah Avivit Levy Ely Porat On the Cost of Interchange Rearrangement in Strings. 99-110 2007 conf/esa/2007 ESA http://dx.doi.org/10.1007/978-3-540-75520-3_11 db/conf/esa/esa2007.html#AmirHKLP07