For many sources listed in Articles+ recommendations of articles are displayed that may be relevant to the same topic area. The machine behind that service is bX Recommender, a system developed by the Primo developer Ex Libris.
The bX recommendation algorithm is based on anonymous usage data that is collected from academic institutions around the world; by anlyzing the usage data, the system identifies articles that have been downloaded in one same session.
BibTip is a book recommender incorporated in the FU Catalog scope in Primo.
BibTip generates links to related sources by statistically analyzing anonymously collected user behavior during searches.