SKĄPSKA, Elżbieta; ROLLNIK-SADOWSKA, Ewa. Efficiency of services in CEE countries—case study of Poland and Belarus. Economics and Business Review, Poland, v. 6, n. 4, p. 118–133, 2020. DOI: 10.18559/ebr.2020.4.7. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/419. Acesso em: 7 apr. 2025.