Multidimensional cluster stability analysis from a brazilian Bradyrhizobium sp. RFLP/PCR data set - Milagre, Selma Terezinha; Maciel, Carlos Dias; Shinoda, Ailton Akira; Cunha, Mariangela Hungria da; Monteiro, José Roberto Boffino de Almeida (Journal of Computational and Applied Mathematics, 2009)