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H. - J.  Urban, ?Culture potential of the pearl oyster (Pinctada imbricata) from the Caribbean. II. Spat collection, and growth and mortality in culture systems?, Aquaculture, vol. 189, pp. 375-388, 2000.

H. - J.  Urban, ?Culture potential of the pearl oyster (Pinctada imbricata) from the Caribbean. I. Gametogenic activity, growth, mortality and production of a natural population?, Aquaculture, vol. 189, pp. 361-373, 2000.

H. - J.  Urban, ?Reproductive strategies in tropical bivalves (Pteria colymbus, Pinctada imbricata and Pinna carnea): temporal coupling of gonad production and spat abundance related to environmental variability?, Journal of Shellfish Research, vol. 20, pp. 1127-1134, 2001.