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:In comparison, the effect of Skp1 modification on culmination implied inhibition of Skp1 breakdown activity toward a hypothetical activator [10,11], and the effects on cyst formation (assessed morphologically) above suggested activation of breakdown activity toward an activator.
Category: