1.
Trifonova I, Angelova S, Korsun N. AETIOLOGICAL STRUCTURE OF ACUTE RESPIRATORY TRACT INFECTIONS AMONG CHILDREN YOUNGER THAN 5 YEARS IN BULGARIA. Probl Infect Parasit Dis [Internet]. 2019 Jun. 27 [cited 2024 May 19];47(1):9-15. Available from: https://pipd.ncipd.org/index.php/pipd/article/view/47_1_2_AETIOLOGICAL_STRUCTURE_OF_ACUTE_RESPIRATORY_TRACT_INFECTI