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 most commonly used configurations of K-wires for fixation are two parallel wires inserted through the lateral condyle across the fracture and continuing into the medial cortex, or two cross-wires, one inserted laterally and one through the medial condyle [5].
Category: