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:Our results are consistent with several studies that have found increases in soil C following conversion of forest to other land uses, primarily pasture (Lugo and Brown, 1993; Fisher et al., 1994; Neill et al., 1997b) and contrast with studies that have found decreases in soil C following conversion (Veldkamp, 1994; Van Dam et al.
Category: