1) Adriaens P. A., Deboever J. A. and Loesche W. J.: Bacterial invasion in root cementum and radiular dentin of periodontally diseased teeth in humansa reservoir of periodontopathic bacteria. J. Periodontol., 59: 222-230, 1988.
2) Morrison S. L., Cobb C. M., Kazakos G. M. and Killoy W. J.: Root surface characteristics associated with subgingival placement of monolithic tetracycline-impregrated fibers. J. Periodontol., 63: 137-143, 1992.
3) Demirel K., Baer P. N. and McNamara T. F.: Topical application of doxycycline on periodontally involved root surfaces in vitro; Comparative analysis of substantivity on cementum and dentin. J. Periodontol., 62: 312-316, 1991.
4) Bjorvatn K.: In vitro study by fluorescence microscopy and microradiography of tetracycline-tooth interaction. Scand. J. Dent. Res., 91: 417-424, 1983
5) Bjorvatn K., Skaug N. and Selvig K. A.: Tetracycline-impregnated enamel and dentin: duration of antimicrobial capacity. Scand. J. Dent. Res., 93: 192-197, 1985