R. Estrela and S. M. Loureiro,  "Advertising self-regulation in Portugal and Spain:  a comparative study", in 3rd EuroMed Conf. of the EuroMed Academy of Business-Business Developments Across- Countries And Cultures , D.Vrontis, Y. Weber, R. Kaufmann, and S. Tarba, Ed., Nicosia, EuroMed Press, 2010, pp. 399-408