1. A 15-year study of osseointegrated implants in the treatment of the edentulous jaw;Adell;International Journal of Oral Surgery,1981
2. The long-term efficacy of currently used dental implants;Albrektsson;International Journal of Oral & Maxillofacial Implants,1986
3. The importance of design and analysis in clinical trials;Antczak-Bouckoms;Journal of Oral Implantology,1988
4. The state of science of patient outcome research;Barmes;Journal of Oral Implantology,1990
5. Treatment concept for mandibular overdentures supported by endosseous implants. A literature review;Batenburg;International Journal of Oral & Maxillofacial Implants,1998a