(2009) „New Protocetid Whale from the Middle Eocene of Pakistan: Birth on Land, Precocial Development, and sexual dimorphism”. PLOS ONE4 (2), e4366. o. DOI:10.1371/journal.pone.0004366. PMID 19194487.
(2005) „The position of Hippopotamidae within Cetartiodactyla”. Proceedings of the National Academy of Sciences102 (5), 1537–1541. o. DOI:10.1073/pnas.0409518102. PMID 15677331.
(2009) „New Protocetid Whale from the Middle Eocene of Pakistan: Birth on Land, Precocial Development, and sexual dimorphism”. PLOS ONE4 (2), e4366. o. DOI:10.1371/journal.pone.0004366. PMID 19194487.
(2005) „The position of Hippopotamidae within Cetartiodactyla”. Proceedings of the National Academy of Sciences102 (5), 1537–1541. o. DOI:10.1073/pnas.0409518102. PMID 15677331.