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2. Studies on the penetration of mercury through the dental hard tissue, using 203 Hg in silver amalgam fillings;Frykholm;Acta Odontol Scand,1955
3. Criteria for a recommended standard … Occupational exposure to inorganic mercury. Department of Health, Education, and Welfare, Public Health Service, National Institute for Occupational Safety and Health, 1973.
4. Significance to health of mercury used in dental practice: a review;Council on Dental Materials and Devices, Council on Dental Research;JADA,1971
5. Systemic mercury levels caused by inhaling mist during high-speed amalgam grinding;Cutright;J Oral Med,1973