Abnormal periostracum secretion during the mineralization process of the pearl in the blacklip pearl oyster Pinctada margaritiferaMichel Comps, Christian Herbaut and Angélique FougerouseAquat. Living Resour., 13 1 (2000) 49-55DOI: https://doi.org/10.1016/S0990-7440(00)00134-0