Andonova, Ivona, Radostina Stefanova, and Stefka Krumova. “LABORATORY COMPARATIVE ANALYSIS OF SEROLOGICAL AND MOLECULAR BIOLOGICAL METHODS FOR DETECTION OF MEASLES VIRUS IN BULGARIA”. PROBLEMS of Infectious and Parasitic Diseases 48, no. 2 (October 15, 2020): 5–11. Accessed March 31, 2025. https://pipd.ncipd.org/index.php/pipd/article/view/48_2_1_laboratory_comparative_analysis.