Alling CC, Meadows DT.
J Hosp Dent Pract. 1972 Oct-Dec;6(4):111-7.
PMID: 4511238

Robbins KS.
J Hawaii Dent Assoc. 1982 Apr;13(1):12-5.
PMID: 6955377

Gilster JE.
N Y J Dent. 1966 Oct;36(8):283.
PMID: 5222649

Rovin S.
Penn Dent J (Phila). 1994;93(1):4-5.
PMID: 15503557

Kaplan RI.
J Am Coll Dent. 1971 Apr;38(2):78-9.
PMID: 5280297

McCall JO.
J Am Coll Dent. 1966 Jul;33(3):150-5.
PMID: 5220846

Adams D.
Dent Today. 2015 Oct;34(10):6.
PMID: 26591489