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:These genes were further filtered through phylogenetic analysis alongwith previously known CSL proteins from Arabidopsis, Brachypodium, maize, and rice, which reflected some non-targeted genes that were removed from further analysis [26].
Category: