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:These results are consistent with field observations of plasma electrolyte concentrations and thermal behaviour of the lizards Sauromalus hispidus and Uromastix acanthinurus (Grenot 1976; Smits 1984) and laboratory observations of S. hispidus (Smits et al. 1986).
Category: