Barnes, L. G. and Mitchell, E. D.. "XXIX: Cetacea".
Evolution of African Mammals, edited by Vincent J. Maglio and H. B. S. Cooke, Cambridge, MA and London, England: Harvard University Press, 2013, pp. 582-602.
https://doi.org/10.4159/harvard.9780674431263.c30
Barnes, L. G. and Mitchell, E. D.. "XXIX: Cetacea" In
Evolution of African Mammals edited by Vincent J. Maglio and H. B. S. Cooke, 582-602. Cambridge, MA and London, England: Harvard University Press, 2013.
https://doi.org/10.4159/harvard.9780674431263.c30