Vetterick J, Garbe M, Dähn A, Cap CH. Classroom Response Systems in the Wild: Technical and Non-Technical Observations. Int. J. Interact. Mob. Technol. [Internet]. 2014 Jan. 5 [cited 2024 May 2];8(1):pp. 21-25. Available from: https://online-journals.org/index.php/i-jim/article/view/3454