Academic OneFile is a general interest database, but it includes several business case journals. Search "business case" OR "business case analysis" OR "business case studies" for the most complete results.
If you are looking for case studies related to business, the Business Source Ultimate database is a useful resource. If you just type case studies in the search box, you will get a lot of results, but those results may not be specific enough for you. Here are tips for getting better results.
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