First, divide your topic and look for authoritative literature. Generally speaking, the content of authoritative literature will be widely used, even if it is not, it may be better than what you are looking for. Authoritative literature, the most direct look at the author's title and citation times, of course, if possible, it is best to analyze it yourself.

Second, check the references of your article over there. The source is not indicated, but it is easily influenced by references, so it is easy to find.

Third, look through relevant excellent blog posts. After reading one or two blog posts, you should know whether your content is important, where it comes from and how it came from.

Fourth, make full use of search engines. Generally, everything that logs into the network can be searched, but you need to master the search method.

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