1. A classification of the edentulous jaws;Cawood;Int. J. Oral Maxillofac. Surg.,1988
2. Der atrophe Oberkiefer und seine Versorgungsmöglichkeiten mit vier ultrakurzen;Ewers;Implantaten Implantologie,2018
3. A principal components analysis: how pneumatization and edentulism contribute to maxillary atrophy;Wagner;Oral Dis.,2017
4. Lecture presented to the Alabama implant congress;Tatum,1976
5. Standard clinical situations - 4.7 edentulous maxilla;Ewers,2012