1. Adell R, Lekholm U, Rockier B, Brånemark PI. A15-year study of osseointegrated implants in the treatment of the edentulous jaw. Int J Oral Surg. 1981;10:387–416.
2. Adell R, Lekholm U, Brånemark PI. Surgical procedures. In: Brånemark PI, Zarb GA, Albrektsson T, editors. Tissueintegrated prostheses: osseointegration in clinical dentistry. Chicago: Quintessence; 1985. p. 232.
3. Adell R, Lekholm U, Rockier B, Brånemark PI, Lindhe J, Eriksson B, et al. Marginal tissue reactions at osseointegrated titanium fixtures (I). A 3-year longitudinal prospective study. Int J Oral Maxillofac Surg. 1986;15:39–52.
4. Albrektsson T, Zarb GA, Worthington P, Eriksson AR. The long-term efficacy of currently used dental implants: a review and proposed criteria of succes. Int J Oral Maxillofac Implants. 1986;1:11–25.
5. Albrektsson T, Sennerby L. Direct bone anchorage of oral implants: clinical and experimental considerations of the concepts of osseointegration. Int J Prosthodont. 1990;3:30–41.