hamada ahmed hamada, karima abdelaty hassan, hossam eldin fawaz, and Y. E. Mohamed, " Relationship between Quadriceps and femoral anteversion angles in patients with patellofemoral pain syndrome", journal of medical science and clinical research, vol. 2, issue 9, pp. 2227-2235, 2014.
manal mohamed ismail, mona hassan gamal eldin, and karima abdelaty hassan, "closed kinetic chain exercises with or without additional hip strengthening exercises in management of patellofemoral pain syndrome:a randomised controlled trial", European journal of physical and rehabilitation medicine, vol. 49, issue 5, pp. 687-698, 2013.