توفيق عثمان محمد توفيق محمد. 2007. “Studding the Relation Between Sum Cretin Variables of Hemodynamic and Circulatory System After Aerobic Effort for Long Distance Runners”. College of Basic Education Research Journal 5 (1):306-31. https://stats.uomosul.edu.iq/index.php/berj/article/view/39873.