(en) Erik R. Seiffert, « Revised age estimates for the later Paleogene mammal faunas of Egypt and Oman », Proceedings of the National Academy of Sciences of the United States of America, vol. 103, no 13, , p. 5000–5005 (PMID16549773, PMCID1458784, DOI10.1073/pnas.0600689103)
(en) Erik R. Seiffert, « Revised age estimates for the later Paleogene mammal faunas of Egypt and Oman », Proceedings of the National Academy of Sciences of the United States of America, vol. 103, no 13, , p. 5000–5005 (PMID16549773, PMCID1458784, DOI10.1073/pnas.0600689103)