NIKOLOVA, Neli. INDUSTRY 4.0 - DEVELOPMENT AND CONSEQUENCES FOR SUSTAINABLE DEVELOPMENT OF BULGARIA. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 245–251, 2021. DOI: 10.17770/etr2021vol3.6543. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/6543.. Acesso em: 3 may. 2024.