1. Yurkiv, O. E., & Tsema, E. V. (2018). Modern view on the causes and treatment of pilonidal and dermoid cysts of the sacrococcygeal region. Ukrainian Scientific and Medical Youth Journal, (1), 30–37.
2. Tsema, E. V. (2017). Global trends in the treatment of pilonidal disease (epithelial coccygeal course). Surgery of Ukraine, (4), 7–16.
3. Rusak, O. B. (2009). Morphological features of epithelial coccygeal passages in acute and chronic phases. Hospital Surgery, (4), 58.
4. Zakharash, M. P., Lyshavsky, O. V., Dubovy, V. A., Stelmakh, A. I., & Yakovleva, N. M. (2010) Ultrasonography in diagnosis and choice of treatment tactics in epithelial hemorrhoids. Surgery of Ukraine. (2), 66–71.
5. Bradley, L. (2010). Pilonidal sinus disease: a review. Part two. journal of wound care, 19(12), 522–530.