Industry 4.0. International Scientific Conference. Industry 4.0: Technological Basis of Industry 4.0 : Dominant Technologies in Industry 4.0 : Business & Industry 4.0 : Society & Industry 4.0 : Proceedings of the III International Scientific Conference, Winter Session, 12-15 December 2018, Borovets, Bulgaria. Volume 2/4. 1st Edition. Sofia : Scientific-Technical Union of Mechanical Engineering Industry 4.0, 2018. online 295 s. ISSN 2535-0161.