Trypilka, S., and Y. Yehudina. “A Clinical Case of the Retroperitoneal Fibrosis (Ormond’s Disease) in Rheumatology Practice”. PAIN, JOINTS, SPINE, vol. 11, no. 1, Apr. 2021, pp. 42-49, doi:10.22141/2224-1507.11.1.2021.226909.