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:…consider not only a multienzymatic system with a significant spontaneous reactivation of the inhibited enzyme, but also possible
interference, which is the most sensitive component undergoing additional ‘‘ongoing inhibition’’ during the substrate reactions according to Estevez and Vilanova (2009).
Category: