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:Jaeger et al. (1999) described Bahinia pondaungensis from three associated specimens—a moderately large left and right maxilla and a lower jaw—recovered from the middle Eocene Pondaung Formation of Myanmar.
Category: