1. Characterization of xenogeneic bone material;Peetz,1997
2. Bio-Oss a resorbable bone substitute?;Schlegel;J Long-Term-Effects Med Implants,1998
3. Ridge preservation — Why not?;Christensen;J Am Dent Assoc,1996
4. Hydroxyl-apatite implants;Denissen;Sci Ceram,1980
5. Osseous reconstruction of the maxilla and the mandible;Boyne,1997