# External source material

Book-page images and downloaded third-party publications are not hosted in this portfolio.

- [Diamond and Halberstam, A Higher-Dimensional Sieve Method, Cambridge University Press (2008)](https://doi.org/10.1017/CBO9780511542909). Research references concern chapters 1, 5, 6 and 9.

Timestamp proofs and hashes refer to the private research snapshot; they do not grant redistribution rights in its source material.