3. Start from a paper¶

- Under Start from a paper, type the DOI of a paper you trust, or attach its PDF.
- Press Add the paper. Its references become papers of the review, and you can go one level deeper from any of them: select them in the list and press Get their references.
References come from the list the publisher deposited with Crossref, else from the OpenCitations index, else, for a preprint such as an arXiv paper, from the reference list in its own PDF.