Fordyce, E.; de Muizon, C. (2001). "Evolutionary history of the cetaceans: a review". Dalam Mazin, J.-M.; de Buffrénil, V. (penyunting). Secondary Adaptations of Tetrapods to Life in the Water: Proceedings of the international meeting, Poitiers, 1996. München, Germany: Verlag Dr. Friedrich Pfeil. m/s.169–233. ISBN3-931516-88-1. LCCN2002550356. OCLC52121251. OL20591860M.
Fordyce, E.; de Muizon, C. (2001). "Evolutionary history of the cetaceans: a review". Dalam Mazin, J.-M.; de Buffrénil, V. (penyunting). Secondary Adaptations of Tetrapods to Life in the Water: Proceedings of the international meeting, Poitiers, 1996. München, Germany: Verlag Dr. Friedrich Pfeil. m/s.169–233. ISBN3-931516-88-1. LCCN2002550356. OCLC52121251. OL20591860M.
Fordyce, E.; de Muizon, C. (2001). "Evolutionary history of the cetaceans: a review". Dalam Mazin, J.-M.; de Buffrénil, V. (penyunting). Secondary Adaptations of Tetrapods to Life in the Water: Proceedings of the international meeting, Poitiers, 1996. München, Germany: Verlag Dr. Friedrich Pfeil. m/s.169–233. ISBN3-931516-88-1. LCCN2002550356. OCLC52121251. OL20591860M.