Multicriteria User Modeling in Recommender Systems

@article{Lakiotaki2011MulticriteriaUM,
  title={Multicriteria User Modeling in Recommender Systems},
  author={Kleanthi Lakiotaki and Nikolaos F. Matsatsinis and Alexis Tsouki{\`a}s},
  journal={IEEE Intelligent Systems},
  year={2011},
  volume={26},
  pages={64-76}
}
The paper mentions that a hybrid recommender systems framework creates user-profile groups before applying a collaborative-filtering algorithm by incorporating techniques from the multiple-criteria decision-analysis (MCDA) field. 
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