Helfand, R. F., Gary, H. E., Atkinson, W. L., Nordin, J. D., Keyserling, H. L., & Bellini, W. J. (1998). Decline of Measles-Specific Immunoglobulin M Antibodies after Primary Measles, Mumps, and Rubella Vaccination. American Society for Microbiology.

Helfand, Rita F., Howard E. Gary, William L. Atkinson, James D. Nordin, Harry L. Keyserling, και William J. Bellini. Decline of Measles-Specific Immunoglobulin M Antibodies After Primary Measles, Mumps, and Rubella Vaccination. American Society for Microbiology, 1998.

Helfand, Rita F., et al. Decline of Measles-Specific Immunoglobulin M Antibodies After Primary Measles, Mumps, and Rubella Vaccination. American Society for Microbiology, 1998.