K.  Wada, ?An electron microscope study of the formation of the periostracum of Pinctada martensii?, Journal of Electron Microscopy, vol. 17, p. 275, 1968.

I. K.  Kawakami and Yasuzumi, G., ?Electron microscope studies on the mantle of the pearl oyster Pinctada martensii Dunker. Preliminary report. The fine structure of the periostracum fixed with permanganate?, Journal of Electron Microscopy, vol. 13, pp. 119-123, 1964.

M.  Comps, Herbaut, C., and Fougerouse, A., ?Abnormal periostracum secretion during the mineralization process of the pearl in the blacklip pearl oyster Pinctada margaritifera?, Aquatic Living Resources, vol. 13, p. 1, 2000.

I. K.  Kawakami and Yasuzumi, G., ?Electron microscope studies on the mantle of the pearl oyster Pinctada martensii Dunker. Preliminary report. The fine structure of the periostracum fixed with permanganate?, Journal of Electron Microscopy, vol. 13, pp. 119-123, 1964.

K.  Wada, ?An electron microscope study of the formation of the periostracum of Pinctada martensii?, Journal of Electron Microscopy, vol. 17, p. 275, 1968.