Vishnyakov, Andrey. 2011. “Sonographic Criteria for Assessing the State of the Pelvic Girdle Muscles in Case of Aseptic Necrosis of the Femoral Head in Adults”. ORTHOPAEDICS TRAUMATOLOGY and PROSTHETICS, no. 4 (March):42-46. https://doi.org/10.15674/0030-59872011442-46.