1) ALEO JJ. The presence and biologic activity of cementum-bound endotoxin. J Periodontol. (1974) vol.45, p.672-675.
2) ALEO JJ. In vitro attachment of human gingival fibroblasts to root surfaces. J Periodontol. (1975) vol.46, p.639-645.
3) NAKIB NM. Endotoxin penetration into root cementum of periodontally healthy and diseased human teeth. J Periodontol. (1982) vol.53, p.368-378.
4) OISON RH. Inhibitory effect of periodontally diseased root extracts on the growth of human gingival fibroblasts. J Periodontol. (1986) vol.56, p.592-596.
5) UEDA M. Effect of periodontal treatment on periodontally-involved root surfaces -What surface character of exposed cementum is need for new attachment?-. Recent advances in clinical periodontology Volume II. Amsterdam Elsevier. (1991) p.455-458.