1) Listgarten, M. A.: Electron microscopic study of the Gingivo-dental junction of man., Am. J. Anat., 119, 147-178, 1966.
2) Schroeder, H. E.: Differentiation of human oral stratified epithelia., S. Karger, Basel, Munchen, Paris, London, New York, Sydney., 1981, 1-306.
3) McDougall, W. A.: Penetration pathways of a topically applied foreign protein into rat gingiva., J. Periodont. Res., 6, 89-99, 1971.
4) Takata, T.: Penetration and Uptake of Colloidal Gold-Labeled Concanavalin A in The Junctional Epithelium of The Rat., J. Periodontol., 59, 823-829, 1988.