Sentence examples for this is referred from inspiring English sources

"this is referred" is a grammatically correct phrase that can be used in written English.
You can use it when you want to indicate that something has been mentioned or mentioned before. For example, if you are writing a research paper and you want to refer back to a concept or argument you mentioned earlier, you could say "This is referred to in more detail in the previous section." Another example could be in a conversation, where someone asks for clarification on a certain topic, and you respond with "This (topic) is referred to in the book I mentioned earlier."