Çakiroğlu , Ünal, S. S. Suiçmez, Y. B. Kurtoğlu, A. Sari, S. Yildiz, and M. Öztürk. “Exploring Perceived Cognitive Load in Learning Programming via Scratch”. Research in Learning Technology, vol. 26, May 2018, doi:10.25304/rlt.v26.1888.