PETROVA, Desislava. Analysis of SMEs in Bulgaria – Assessment of Their Innovation Activities. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 46–49, 2015. DOI: 10.17770/etr2013vol3.880. Disponível em: https://journals23.rta.lv/index.php/ETR/article/view/880.. Acesso em: 23 nov. 2024.