1. Studies in the variability of pock counts;Armitage;Journal of Hygiene,1957
2. Correlation of three potency assay methods for smallpox vaccines;Bartell;Journal of Immunology,1962
3. Proposed potency testing of smallpox vaccine. II. Comparative titration in rabbit, chick embryo and tissue culture;Cabasso;Journal of Immunology,1961
4. Comparative susceptibility of cell cultures to vaccinia virus; application to the standardization of smallpox vaccine;Cutchins,1958
5. Tissue culture end-point titrations as a routine potency test for smallpox vaccine;Espmark;Archiv für die gesamte Virusforschung,1964