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:With the aim of contributing to the knowledge of the negative regulation of the synthesis of flavonoids in grapevine, a search was conducted in the NCBI/GenBank Database using the sequence of Fragaria × ananasa FaMYB1, a repressor of the flavonoid biosynthesis (Aharoni et al. 2001; Paolocci et al. 2011).
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