DEMIROVA, Siyka Dimitrova; AHMEDOVA, Sibel Ilhanova. Opportunities to increase innovation activity in small and medium-sized industrial enterprises. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, [S. l.], v. 1, n. 1, p. 45–51, 2017. DOI: 10.29114/ajtuv.vol1.iss1.39. Disponível em: https://aj.tu-varna.bg/index.php/ajtuv/article/view/39. Acesso em: 2 oct. 2025.