Gingerich, D.; Haq, U.; Zalmout, S.; Khan, H.; Malkani, S. (Sep 2001). "Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan". Science293 (5538): 2239–2242. Bibcode 2001Sci...293.2239G. doi:10.1126/science.1063902. ISSN 0036-8075. PMID 11567134. edit
Gingerich, D.; Haq, U.; Zalmout, S.; Khan, H.; Malkani, S. (Sep 2001). "Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan". Science293 (5538): 2239–2242. Bibcode 2001Sci...293.2239G. doi:10.1126/science.1063902. ISSN 0036-8075. PMID 11567134. edit
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Gingerich, D.; Haq, U.; Zalmout, S.; Khan, H.; Malkani, S. (Sep 2001). "Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan". Science293 (5538): 2239–2242. Bibcode 2001Sci...293.2239G. doi:10.1126/science.1063902. ISSN 0036-8075. PMID 11567134. edit
Gingerich, D.; Haq, U.; Zalmout, S.; Khan, H.; Malkani, S. (Sep 2001). "Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan". Science293 (5538): 2239–2242. Bibcode 2001Sci...293.2239G. doi:10.1126/science.1063902. ISSN 0036-8075. PMID 11567134. edit