Muressama Viagem, Salomão António. “Collective Marks, Certification or Guarantee Marks, Appellations of Origin and Geographical Indications”. The Journal of Intellectual Property – Contemporary Law and Constitution, vol. 8, no. 1, Feb. 2019, pp. 1-52, https://doi.org/10.16928/2316-8080.v12n3p.001-052.