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:[41] reported a C2H2-type zinc finger transcription factor, Al resistance transcription factor 1 (ART1), which regulates the expression of genes related to Al tolerance in rice, including STAR1 and STAR2.
Category: