Authors
Maria Curie-Skłodowska University in Lublin, — a retired researcher and didactic employee of the Institute of Management of the Faculty of Economics of the Maria Curie-Skłodowska University in Lublin, Lublin
© 2022 Jerzy Baruk, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.