APPLICATION OF ALTERNATIVE APPROACHES FOR INNOVATIVE TECHNOLOGY OBSOLESCENCE IN BULGARIAN ENGINEERING COMPANIES. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 4, p. 323–327, 2025. DOI: 10.17770/etr2025vol4.8462. Disponível em: https://archive-journals.rtu.lv/etr/article/view/5183.. Acesso em: 11 mar. 2026.