Ključnikov, Aleksandr, Mehmet Civelek, Iveta Vozňáková, and Vladimír Krajčík. “Can Discounts Expand Local and Digital Currency Awareness of Individuals Depending on Their Characteristics?”. Oeconomia Copernicana 11, no. 2 (June 22, 2020): 239-266. Accessed September 19, 2020. http://economic-research.pl/Journals/index.php/oc/article/view/1784.