Case Study: In the social and life sciences, a case study is a research method involving an up-close, in-depth, and detailed examination of a subject of study, as well as its related contextual conditions. Case studies can be produced by following a formal research method.
Academic Research Paper: In academic publishing, a research paper is an academic work that is usually published in an academic journal. It contains original research results or reviews existing results. Such a paper, also called an article, is only considered valid if it undergoes a process of peer review by one or more referees (who are academics in the same field) who check that the content of the paper is suitable for publication in the journal. A paper may undergo a series of reviews, revisions, and re-submissions before finally being accepted or rejected. Other limiters that also convey this idea: Peer Reviewed, Academic Journal, or Scholarly Journal.
Limiters: The search engines below allow you to not only search for journal articles, but to also use their filtering (or limiting) capabilities to limit your search results to *only* academic/scholarly research papers or case studies. . You can usually find these limiters on the left side of the search results page. You can also limit by date, author, publication, topic, and more.
Example of using quotation marks in your search, which helps your keywords stick together as one phrase.
Example of limiters.