Lawrence H. Tanner, Frank T. Kyte, John H. Puffer: Widespread elevated iridium in Upper Triassic–Lower Jurassic strata of the Newark Supergroup: implications for use as an extinction marker. Scientific Reports, 11.11.2020, nro 10, s. 19575. doi:10.1038/s41598-020-76238-4. ISSN 2045-2322. Artikkelin verkkoversio. en
Lawrence H. Tanner, Frank T. Kyte, John H. Puffer: Widespread elevated iridium in Upper Triassic–Lower Jurassic strata of the Newark Supergroup: implications for use as an extinction marker. Scientific Reports, 11.11.2020, nro 10, s. 19575. doi:10.1038/s41598-020-76238-4. ISSN 2045-2322. Artikkelin verkkoversio. en
Lawrence H. Tanner, Frank T. Kyte, John H. Puffer: Widespread elevated iridium in Upper Triassic–Lower Jurassic strata of the Newark Supergroup: implications for use as an extinction marker. Scientific Reports, 11.11.2020, nro 10, s. 19575. doi:10.1038/s41598-020-76238-4. ISSN 2045-2322. Artikkelin verkkoversio. en