International Conference on Decision Making for Small and Medium-Sized Enterprises 2021. DEMSME 2021. 3rd International Conference on Decision Making for Small and Medium-Sized Enterprises (DEMSME 2021) : Conference Proceedings. 1st Edition. Karviná : Silesian University in Opava. School of Business Administration in Karviná, 2021. 710 s. Available on Internet: <https://demsme.opf.slu.cz/images/DEMSME_2021_Proceedings.pdf> ISBN 978-80-7510-456-4.