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 results are in line of evidences from highly diverged G. complanata in Slovenia (Verovnik et al. 1999), E. punctata in northern Arizona (Govedich et al. 1999) in addition to high morphological diversities (Sket & Trontelj 2008).
Category: