1. Ali, A.A. (1999). Mathematical training between theory and practice, 1st edition: (Cairo, Al-Kitab Center for Publishing, 1999), pg. 42.
2. Alwan, S.A., Jawad, K.K., Alyaseri, N.H.A., Subhi, K.A., Hussein, E.K., Aned, A.M., et al. (2023). The Psycholoical Effects of Perfectionism On Sport, Economic And Engineering Students. Revısta Iberoamericana De Psıcología Del Ejercıcıo Y El Deporte, 18(330–333), 1–3.
3. Alyaseri, N.H.A., Salman, M.D., Maseer, R.W., Hussein, E.K., Alwan, S.A., Zwaid, J.G., et al. (2023). Exploring The Modeling of Socio-Technical Systems In The Fields Of Sport, Engineering And Economics. Revista Iberoamerıcana De Psicología Del Ejercıcıo Y El Deporte, 18(3), 248–253.
4. Al-Zubaidi, A. K. (1999). The impact of a proposed approach to the special muscular strength in the development of some special requirements skills on the mat of floor movements: (PhD thesis, University of Baghdad / College of Physical Education), pp. 64-66.
5. Ali, A.M. (2005). The Effect of Feedback on the Most Important Kinematic Variables in the Performance and Achievement of the Javelin Throw for Beginners, Master Thesis, p. 181.