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:, 2006), and there are many examples of studies examining the adoption of mobile technology and mobile services (Balocco et al., 2009; Kim and Garrison, 2009; Liang et al., 2007), to the best of the authors’ knowledge, this is the first study to combine these two perspectives in an attempt to understand how sales forces adopt mobile technology for the purposes of accessing CRM systems.
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