Koroglu, Mehmet, Selami Gunal, Fatma Yildiz, Mehtap Savas, Ali Ozer, and Mustafa Altindis. “Comparison of Keypads and Touch-Screen Mobile Phones Devices As Potential Risk for Microbial Contamination”. The Journal of Infection in Developing Countries 9, no. 12 (December 30, 2015): 1308–1314. Accessed November 28, 2024. https://jidc.org/index.php/journal/article/view/26719936.