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:…samples of dimension d we are interested in approximating the joint distribution p0(X1, ..., Xd) of data using different methods:
• The KEF model from Sriperumbudur et al., 2017 approximates p by a distribution pf that belongs to the KEF (1) by minimizing the score loss between p and pf to find…
Category: