1. Bowen, R. L.: U.S. Pat. 3,066,112 (Nov. 27, 1962).
2. Epoxy adhesives for orthodontic attachments;Newman;Am. J. Orthod.,1965
3. Adhesion and orthodontic plastic attachments;Newman;Am. J. Orthod.,1969
4. Bandless orthodontic brackets;Mitchell;J. Am. Dent. Assoc.,1967
5. Direct cementation of orthodontic brackets to dental enamel;Mizrahi;Br. Dent. J.,1969