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 adaptations consisted of using an analytical approximation for the stress fiber remodeling algorithm to reduce computational costs (Ristori et al., 2015), and including both the loaded and unloaded configuration in the assessment of the degree of collagen contraction and strain-induced collagen degradation.
Category: