Vern S. Poythress, “An Information-based Semiotic Analysis of Theories concerning Theories (PDF), Semiotica 2013/193 (Feb., 2013): 83-99, ISSN (Online) 1613-3692, ISSN (Print) 0037-1998, DOI: 10.1515/sem-2013-0005. Published online 2013-02-22. Used with permission.
