Georgieva, Irina, et al. “ISOLATION AND GENETIC IDENTIFICATION OF HUMAN NON-POLIO ENTEROVIRUSES AT THE NATIONAL REFERENCE LABORATORY OF ENTEROVIRUSES, BULGARIA”. PROBLEMS of Infectious and Parasitic Diseases, vol. 53, no. 3, Dec. 2025, pp. 17-22, https://doi.org/10.58395/9xctnf19.