For the Articles+ scope, there is a functionality in Primo that directs to articles that either cite, or are cited by, a particular article.
That functionality facilitates finding out which authors cite which other authors, and it can be useful for finding related literature.
Please note: Citation-trail functionality works only for sources in the Articles+ scope the full texts of which are available to the Primo search engine to analyze.
→ Obviously, the citation-trail results cannot, and do not, make any claim of completeness. The intention is not to give an exhaustive documentation of every single connection within the entire world network of academic publications, but to use available data to facilitate discovery of publications.
In order to study citation patterns more thoroughly, use bibliographic databases, such as Web of Science or Google Scholar.