Hradec Economic Days 2018 : Production Economics in the Context of Industry 4.0. International Scientific Conference. Hradec Economic Days 2018 (Part II.) : Proceedings of the International Scientific Conference, January 30–31, 2018, (Hradec Králové, Czech Republic). Vol. 8(2). 1st Edition. Hradec Králové : University of Hradec Králové, 2018. online 591 s. ISBN 978-80-7435-701-5. ISSN 2464-6059.