1. Radioactive phosphate permeability in dentin following the use of medicaments;Amler;J.D. Res,1948
2. Dentin permeability to radioactive phosphorus after specific time intervals following the application of various drugs;Amler;New York J. Den,1951
3. In vitro experiments on exchange of phosphate by enamel and dentin;Armstrong;Proc. Soc. Exper. Biol. & Med,1940
4. Concurrent use of radioisotopes of calcium and phosphorus in the study of the metabolism of calcified tissues;Armstrong;J. Biol. Chem,1948
5. Penetration of radiocalcium at the margins of filling materials: a preliminary report;Armstrong;J.A.D.A.,1951