Çoban E, Alver B, Aslan A. The Effect of Mental Exercise and Repetition Studies on the Mental Performance of 7th Class Students of Primary Schools. PERR [Internet]. 2013 Apr. 1 [cited 2024 May 19];2(1):68-80. Available from: https://perrjournal.com/index.php/perrjournal/article/view/387