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In fact, the question appears to be already answered since Mexico, as previously reported here, is now also part of this protocol.
The article's title is the heading of this post and is written by Andres Echeverri Uribe, Organizacion Corona, Bogota, and I. While the article embarks on studying the advantages and disadvantages of accession for the Colombia’s market in an era of globalization, it also explores the reality of its own small and medium enterprises (SMEs) when trade mark is at issue.
The article can be accessed through Westlaw or Lawtel.