In theory, authors cite an item because it is relevant to the topic of their own work. Many library databases, including CINAHL and PubMed, provide a means to easily trace either citing items (written after an article is published), cited items (the bibliography or references list from the article itself), or both.
The original and best-known database for citation searching, covering nursing and many other disciplines, is Web of Science. Scopus also offers citation searching for a broad range of journals.
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