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:…in the natal burrow (Hare & Murie 1996) and only littermate kin appear to act as ‘genial neighbours’ providing direct and indirect fitness benefits (Viblanc et al. 2010; Dobson et al. 2012).
data analyses
To investigate the effects of individual kin on energy allocation strategies and fitness,…
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