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Wang, Zhifang, Rui Yan, Hanqing He, Qian Li, Guohua Chen, Shengxu Yang, and Enfu Chen. Difficulties in Eliminating Measles and Controlling Rubella and Mumps: A Cross-Sectional Study of a First Measles and Rubella Vaccination and a Second Measles, Mumps, and Rubella Vaccination. Public Library of Science, 2014.

Wang, Zhifang, et al. Difficulties in Eliminating Measles and Controlling Rubella and Mumps: A Cross-Sectional Study of a First Measles and Rubella Vaccination and a Second Measles, Mumps, and Rubella Vaccination. Public Library of Science, 2014.