Arafa, M. A., Y. I. Seada, W. Talaat, and P. D. Hayam M Sayed,  "Isokinetic Knee Flexors\Extensors Muscle Strength Ratio of Affected and Unaffected Side in Stroke Patients",  Bull. Fac. Ph. Th. Cairo Univ., vol. 13, issue 2, pp. 19-28, 2008.