| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 186, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 186, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 191, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 191, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 193, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | The Classical Aristotelian Hexagon Versus the Modern Duality Hexagon, p. 193, by Smessaert, Hans | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 72, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 72, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 72, by Moretti, Alessio | 2012 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Square |
| | Why the Logical Hexagon?, p. 73, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 73, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 73, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 73, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 73, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 70, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 70, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 70, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 70, by Moretti, Alessio | 2012 | Classical Sigma-2 | 3 | Square |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Sherwood-Czeżowski Sigma-3 | 4 | Hexagon |
| | Why the Logical Hexagon?, p. 71, by Moretti, Alessio | 2012 | Buridan Sigma-4 | 6 | Rectangle |