Benjamin E. Cohen, Darren F. Mark, Martin R. Lee and Sarah L. Simpson (2017). A new high-precision 40Ar/39Ar age for the Rochechouart impact structure: At least 5 Ma older than the Triassic–Jurassic boundary. Meteoritics & Planetary Science (advance online publication) doi: 10.1111/maps.12880 http://onlinelibrary.wiley.com/doi/10.1111/maps.12880/full
