1. Sumy State University, Oleg Balatskyi Academic and Research Institute of Finance, Economics and Management, Department of Marketing, Rymskogo-Korsakova st. 2, 40007, Sumy, Ukraine
2. Alexander Dubček University of Trenčín, Faculty of Industrial Technologies in Púchov, Department of Numerical Methods and Computational Modeling, Ivana Krasku 491/30, 020 01 Púchov, Slovakia
3. Alexander Dubček University of Trenčín, Faculty of Industrial Technologies in Púchov, Department of Material Technologies and Environment, Ivana Krasku 491/30, 020 01 Púchov, Slovakia