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:The selected journals were based on those used in the earlier studies by Kohl and Davis (1985) and by Nisonger and Davis (2005), additional ones suggested by participants in the latter study, and the 20 journals with the highest JIF in the Information Science and Library Science category of the…
Category: