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:A region with considerable high lead occurrence is the Beaufort Sea which is in accordance with the results ofMiles and Barry(1998). Rigor et al.(2002) described the ice drift in the Beaufort Sea, which follows the rotational movement of the Beaufort Gyre.
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