REDAKTIONEN, .-. Erhardtsen, Aage: Evolution of concentration and competition in the Danish newspaper and magazine sector. Evolution of Concentration Competition Series, 10. Bruxelles: of the European Communities, 185 pp. Kr. 31,60. Nationaløkonomisk Tidsskrift, [S. l.], v. 117, 1979. Disponível em: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/63190. Acesso em: 25 maj. 2024.