De Almeida, Marcio Rodrigues; Henriques, José Fernando Castanha; Ursi, Weber (2002-05-01). "Comparative study of the Fränkel (FR-2) and bionator appliances in the treatment of Class II malocclusion". American Journal of Orthodontics and Dentofacial Orthopedics. 121 (5): 458–466. doi:10.1067/mod.2002.123037. ISSN0889-5406. PMID12045763.
De Almeida, Marcio Rodrigues; Henriques, José Fernando Castanha; Ursi, Weber (2002-05-01). "Comparative study of the Fränkel (FR-2) and bionator appliances in the treatment of Class II malocclusion". American Journal of Orthodontics and Dentofacial Orthopedics. 121 (5): 458–466. doi:10.1067/mod.2002.123037. ISSN0889-5406. PMID12045763.
Rodrigues de Almeida, Marcio; Castanha Henriques, José Fernando; Rodrigues de Almeida, Renato; Ursi, Weber (2002-10-01). "Treatment effects produced by Fränkel appliance in patients with class II, division 1 malocclusion". The Angle Orthodontist. 72 (5): 418–425. ISSN0003-3219. PMID12401050.
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De Almeida, Marcio Rodrigues; Henriques, José Fernando Castanha; Ursi, Weber (2002-05-01). "Comparative study of the Fränkel (FR-2) and bionator appliances in the treatment of Class II malocclusion". American Journal of Orthodontics and Dentofacial Orthopedics. 121 (5): 458–466. doi:10.1067/mod.2002.123037. ISSN0889-5406. PMID12045763.
Rodrigues de Almeida, Marcio; Castanha Henriques, José Fernando; Rodrigues de Almeida, Renato; Ursi, Weber (2002-10-01). "Treatment effects produced by Fränkel appliance in patients with class II, division 1 malocclusion". The Angle Orthodontist. 72 (5): 418–425. ISSN0003-3219. PMID12401050.