The BiBTeX citation of DifFUZZY is:

@article{ Cominetti2010 ,
      author = { Cominetti, O. and Matzavinos, A.
         and Samarasinghe, S. and Kulasiri, D. and
         Liu, S. and Maini, P.K. and Erban, R. },
      title = { DifFUZZY: A fuzzy clustering
                  algorithm for complex data sets },
      journal = { Int. J. Computational Intelligence
             in Bioinformatics and Systems Biology },
      year = { 2010 } ,
      volume = { 1 } ,
      number = { 4 } ,
      pages = {  402 -- 417  }  }