Quantitative Methods in Economics: Multiple Criteria Decision Making XX Proceedings of the International Scientific Conference: 27th May - 29th May 2020, Púchov, Slovakia - Reiff, Marian, 1978-; Gežík, Pavel, 1983-; Lukáčik, Martin, 1974-; Balcerzak, Adam P.; Borovička, Adam (Letra Edu, 2020)