1. Dental calculus: a bacteriological and physical study;Yardeni;J.D. Res.,1948
2. Relationship of pH to calculus precipitation;Lash;Oral Surg., Oral Med. & Oral Path.,1959
3. Caries and calculus;Mezl;J. Canad. D.A.,1959
4. Some observations on the fluoride concentration of dental tissues;Jenkins;J.D. Res.,1954
5. The nature of surface enamel;Speirs;Brit. D.J.,1959