↑(en) Donovan, « Pleistocene echinoids (echinodermata) from Bermuda and Barbados », Proceedings of the Biological Society of Washington, vol. 107, , p. 109-113 (lire en ligne).
↑‘DONOVAN, Stephen Kenneth’, Who's Who 2013, A & C Black, an imprint of Bloomsbury Publishing plc, 2013; online edn, Oxford University Press, Dec 2012 ; online edn, Nov 2012 accessed 12 July 2013