Nery, E. B. and Lynch, K. L.: Preliminary clinical studies of bioceramic in periodontal osseous defects. J. Periodontol., 49: 523-527, 1978.
Pearson, G. E., Rosen, S. and Deporter, D. A.: Preliminary observations on the usefulness of a decalcified, freeze-dried cancellous bone allograft material in periodontal surgery. J. Periodontol., 52: 55-59, 1981.