1. Skinner’s science of dental materials;Phillips,1973
2. Physical and mechanical properties of gold and base-metal alloys;Moffa,1977
3. State of the industry statistical survey on unit costs, materials, and opinions;Bagley;Dent Lab Rev,1980
4. Abnormal trace metals in man-nickel;Schroeder;J Chron Dis,1962
5. Measurements of nickel in serum and urine as indices of environmental exposure to nickel;McNeely;Clin Chem,1972