1. Funktionskieferorthopäide und der Mundvorhof als apparative Basis;Fränkel,1967
2. Technik und Handhabung der Funktionsreglar;Fränkel,1973
3. The theoretical concept underlying the treatment with functional correctors;Fränkel;Trans Eur Orthod Soc,1966
4. The treatment of Class II, Division 1 malocclusion with functional correctors;Fränkel;Am J Orthod,1969
5. The functional matrix and its practical importance in orthodontics;Fränkel;Trans Eur Orthod Soc,1969