Authors
Štefan Koco
National Agriculture and Food Centre, Lužianky
University of Prešov, Prešov
Radoslav BujnovsKý
Association Energy, Leopoldov
© 2021 Štefan Koco, Radoslav BujnovsKý, published by National Agricultural and Food Centre
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.