1. 1. Hviid A, Rubin S, Mühlemann K. Mumps. Lancet. 2008;371:932-44.
2. 2. Carbone KM and Rubin S. Mumps virus. In: Knipe DM, Howley PM, Griffin DE, et al., editors. Fields Virology. 5th ed. vol. I. Philadelphia: Lippincott Williams & Wilkins; 2007. p. 1528-50.
3. 3. World Health Organization. Mumps virus nomenclature update: 2012. Wkly Epidemiol Rec. 2012;87:217-24.
4. 4. National Institute of Infectious Diseases and Tuberculosis and Infectious Diseases Control Division, Ministry of Health, Labour and Welfare. Mumps (infectious parotitis) in Japan, as of July 2013. Infect Agents Surveillance Rep. 2013;34:219'-20'.
5. 5. Jin L, Beard S, Brown DW. Genetic heterogeneity of mumps virus in the United Kingdom: identification of two new genotypes. J Infect Dis. 1999;180:829-33.