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:For example, it is well known that translation-invariant undecimated wavelets (Coifman and Donoho, 1995) are a dramatically more effective domain than the basic fully decimated orthogonal (or biorthogonal) wavelets for denoised a signal by shrinkage; the realization of
1 This work was partially…
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