Collaborative networks and digital transformation 20th IFIP WG 5.5 Working Conference on Virtual Enterprises, PRO-VE 2019, Turin, Italy, September 23-25, 2019 : proceedings - Camarinha-Matos, Luis M. 1955-; Afsarmanesh, Hamideh 1953-; Antonelli, Dario (IFIP Advances in Information and Communication Technology, 2019)