1. Aspiration before injection of dental local anesthetics;Harris;J Oral Surg,1957
2. Notes on aspiration before injection of local anesthetics using dental cartridges;Forrest;Brit Dent J,1959
3. Aspirator syringes—facts and figures;Frye;J N Carolina D Soc,1962
4. Changing concepts in the practice of exodontia and oral surgery;Shira;J Ontario D Assn,1962
5. Frequency of accidental intravascular injection of local anesthetics in dental practice;Schiano;Oral Surg,1964