Paola Bonizzoni Gianluca Della Vedova Riccardo Dondi Tao Jiang On the Approximation of Correlation Clustering and Consensus Clustering. 671-696 2008 74 J. Comput. Syst. Sci. 5 http://dx.doi.org/10.1016/j.jcss.2007.06.024 db/journals/jcss/jcss74.html#BonizzoniVDJ08