RALEVIĆ, Predrag; DOBRODOLAC, Momčilo; ŠVADLENKA, Libor; ŠARAC, Dragana; ĐURIĆ, Dejan. Efficiency and productivity analysis of universal service obligation: a case of 29 designated operators in the European countries. Technological and Economic Development of Economy, [S. l.], v. 26, n. 4, p. 785–807, 2020. DOI: 10.3846/tede.2020.12062. Disponível em: https://journals.vilniustech.lt/index.php/TEDE/article/view/12062. Acesso em: 12 may. 2025.