| | On the 3D Visualisation of Logical Relations, p. 329, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | On the 3D Visualisation of Logical Relations, p. 330, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | On the 3D Visualisation of Logical Relations, p. 330, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | On the 3D Visualisation of Logical Relations, p. 330, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | WJ-40: Implicature, truth, and meaning, p. 6, by Horn, Laurence | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | WJ-40: Implicature, truth, and meaning, p. 10, by Horn, Laurence | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | Manuel d'intelligence artificielle, p. 230, by Frécon, Louis; Kazar, Okba | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | Manuel d'intelligence artificielle, p. 369, by Frécon, Louis; Kazar, Okba | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | Logique formelle, p. 70, by Peeters, Marc; Richard, Sébastien | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | Philosophie et histoire des religions, p. 121, by Dessain, Béatrice | 2009 | Classical Sigma-2 | 3 | Square |
| | Philosophie et histoire des religions, p. 126, by Dessain, Béatrice | 2009 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Square |
| | The Geometry of Logical Opposition, p. 75, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | The Geometry of Logical Opposition, p. 76, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | The Geometry of Logical Opposition, p. 77, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 77, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 78, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | The Geometry of Logical Opposition, p. 79, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 79, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 79, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | The Geometry of Logical Opposition, p. 79, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | The Geometry of Logical Opposition, p. 80, by Moretti, Alessio | 2009 | | | |
| | The Geometry of Logical Opposition, p. 80, by Moretti, Alessio | 2009 | | | Triangle |
| | The Geometry of Logical Opposition, p. 80, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 80, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Geometry of Logical Opposition, p. 80, by Moretti, Alessio | 2009 | Classical Sigma-2 | 3 | Square |