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:Some other studies have offered interpretations different from our result, namely that Ambulocetus and desmostylians were capable of terrestrial locomotion on all four limbs or on bellies like extant seals (i.e. Thewissen et al. 1994; Madar et al. 2002; Inuzuka, 2005, 2009).
Category: