Faris Yousif, J., and R. I. Mahmood. “Effect of Hot Chair Strategy on the Acquisition of Second-Grade Middle Class Students”. Utopía Y Praxis Latinoamericana, Vol. 25, no. 1, May 2020, pp. 545-64, http://www.produccioncientifica.luz.edu.ve/index.php/utopia/article/view/31967.