Migliore, A., S. Tormenta, U. Massafra, L. S. Martin Martin, E. Carloni, C. Padalino, A. Alimonti, and M. Granata. “18 Month Observational Study on Efficacy of Intraarticular Hyaluronic Acid (Hylan G-F 20) Injections under Ultrasound Guidance in Hip Osteoarthritis”. Reumatismo, vol. 58, no. 1, Mar. 2006, pp. 39-49, doi:10.4081/reumatismo.2006.39.