Give it one good paper you already have. It shows the papers that one builds on, and the newer papers that build on it, so you can map a field without a paid database.
This follows citations out from a single seed. It is how you widen a reading list quickly, but it is not an exhaustive review, and it leans toward well-cited work, so newer or niche papers can be missed.
Use a strong, on-topic seed for the best chain. Tap "Use as seed" on any result to walk the chain further out.
Runs in your browser against OpenAlex. Nothing is stored.