def author_names(self):
        """
        Returns a dictionary like this:

        {
            "urn:cts:greekLit:tlg0012$$n1" : "Homer"
            , "urn:cts:greekLit:tlg0012$$n2" : "Omero"
            , ...
        }
        """
        return {"%s$$n%i" % (author.get_urn(), i): name[1]
                for author in self.get_authors()
                for i, name in enumerate(author.get_names())
                if author.get_urn() is not None}