Nagy, Csongor, Ernő Molnár, and Éva Kiss. “Industry 4.0 in a Dualistic Manufacturing Sector – Qualitative Experiences from Enterprises and Their Environment, Eastern Hungary”. Hungarian Geographical Bulletin 69, no. 2 (June 30, 2020): 157-174. Accessed August 8, 2020. https://ojs.mtak.hu/index.php/hungeobull/article/view/3036.