AI tools to help marking papers

As an educator, I usually ask my students to write papers. They submit the papers in PDF format. I am looking for AI tools that can answer these questions:

• What references are being used in the paper. This is just a “Hello World” of testing the tool. Can it understand the structure of the paper?
• Are those references being used (cited) in the body of the text? Some students may put references that are not being used.
• Are those references written according to a standard. The standard could be APA, IEEE, ACM, or some specific (journal) publications’ standards.