Genova, Sylvia, Mina Pencheva, and Petar Uchikov. 2023. “COMORBIDITY AND CAUSE OF DEATH IN THE DIFFERENT VARIANTS OF SARS-COV-2 VIRUS, WITH CONTRIBUTION OF 20 AUTOPSY CASES”. PROBLEMS of Infectious and Parasitic Diseases 51 (1): 26-36. https://doi.org/10.58395/m27hv064.