1. McCracken's removable partial prosthodontics;Henderson,1981
2. The Parallello-Facere: a parallel drilling machine for use in the oral cavity;Solle;J Am Dent Assoc,1961
3. Machine-controlled tooth preparation;Jermyn;Dent Digest,1962
4. Position finder for parallelism;Gamer;J Prosthet Dent,1965
5. The Pontostructor method and a new impression technique;Goransson;J Prosthet Dent,1965