1) Barrington, E.P., O'Bannon, J.Y.Jr., Ochsenbein, C. and Stallard, R.E: When and to what extent do you remove or recontour bone in periodontal therapy?. J. Periodontol., 43: 184-188, 1972.
2) Ochsenbein, C.: Current status of osseous surgery. J. Periodontol., 48: 577-586, 1977.