Fokunang, C., J. Chia, P. Ndumbe, P. Mbu, and J. Atashili. “Clinical Studies on Seroprevalence of Rubella Virus in Pregnant Women of Cameroon Regions”. African Journal of Clinical and Experimental Microbiology, vol. 11, no. 2, Apr. 2010, doi:10.4314/ajcem.v11i2.53913.