Makarova, G. V., and A. A. Avramenko. 2018. “The Frequency of Detection of Various Forms of Deforming Bronchitis During Endoscopic Examination of Patients With Bleeding from the Broncho-Pulmonary System”. Journal of Education, Health and Sport 8 (11):617-24. https://apcz.umk.pl/JEHS/article/view/6504.