NENOV, Nicholay Hristov. INDUSTRY 4.0 – ADVANTAGES ANDCHALLENGES IN THE REPUBLIC OF BULGARIA. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 178–182, 2021. DOI: 10.17770/etr2021vol1.6511. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/6511.. Acesso em: 6 may. 2024.