Borodulya, V. L., E. M. Grechka, M. E. Stepakhina, and E. A. Derbina. 2017. “Investigation of Effectiveness of Surgical Treatment of Chronic Dacryocystitis - Endonasal Dacryocystorhinostomy”. Medicni Perspektivi 22 (3):69-72. https://doi.org/10.26641/2307-0404.2017.3.111928.