Azzali, Emanuele, Gialuca Milanese, Ilenia Martella, Margherita Ruggirello, Valeria Seletti, Chiara Ganazzoli, Nicola Emanuele Bono, Francesco Negri, Francesco Pogliacomi, and Massimo De Filippo. “Imaging of Osteonecrosis of the Femoral Head”. Acta Bio Medica Atenei Parmensis 87, no. 3 - S (July 28, 2016): 6-12. Accessed October 29, 2020. https://www.mattioli1885journals.com/index.php/actabiomedica/article/view/5634.