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:From our results and from some complementary findings elsewhere (e.g., Ullmann et al. 1985; Bowie and Ward 2004; Scalon and Wright 2015; Scalon et al. 2016a), we could confirm that mistletoe stomatal behaviour was responding to environmental influences.
Category: