Chacko, A., M. Babu, and D. K. Thomas. “Osteonecrosis of Bilateral Femoral Head in a Post COVID-19 Patient: Case Report”. International Journal of Research in Orthopaedics, vol. 7, no. 3, Apr. 2021, pp. 674-8, doi:10.18203/issn.2455-4510.IntJResOrthop20211630.