1. Ossseointegration: a requiem for the periodontal ligament (editorial)?;Zarb;Int J Periodontics Restorative Dent,1991
2. Surgical procedures;Adell,1985
3. Radiological results;Strid,1985
4. The use of the Periotest value as the initial success criteria of an implant: 8-year report;Aparicio;Int J Periodontics Restorative Dent,1997
5. Periotest method as a measure of osseointegrated oral implant stability;Olive;Int J Oral Maxillofac Implants,1990