Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Another population of Astyanax eigenmanniorum, from Caetano stream, Uberlandia/MG, analyzed by Torres-Mariano and Morelli (2008), showed a formula of 14m + 18sm + 10st + 6a, constituted by a greater number of meta- and submetacentric chromosomes (32), compared with the results obtained in this…
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