| | The Problem of Existential Import in First-Order Consequential Logics, p. 135, by Pizzi, Claudio | 2009 | Classical Sigma-2 | 3 | Square |
| | The Problem of Existential Import in First-Order Consequential Logics, p. 141, by Pizzi, Claudio | 2009 | Sigma-4 Graph | 3–16 | Cube |
| | The Problem of Existential Import in First-Order Consequential Logics, p. 142, by Pizzi, Claudio | 2009 | Buridan Sigma-4 | 4–6 | Hexagon |
| | The Problem of Existential Import in First-Order Consequential Logics, p. 145, by Pizzi, Claudio | 2009 | Classical Sigma-2 | 3 | Square |
| | Moral Grammar and Intuitive Jurisprudence: A Formal Model of Unconscious Moral and Legal Knowledge, p. 44, by Mikhail, John | 2009 | Classical Sigma-2 | 3 | Rectangle |
| | On the 3D Visualisation of Logical Relations, p. 310, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | On the 3D Visualisation of Logical Relations, p. 310, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Rectangle |
| | On the 3D Visualisation of Logical Relations, p. 311, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Cube |
| | On the 3D Visualisation of Logical Relations, p. 311, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 311, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 311, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 311, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 312, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 312, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Three Dimensional Shape |
| | On the 3D Visualisation of Logical Relations, p. 312, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 313, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 313, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 313, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 321, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 321, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Octahedron |
| | On the 3D Visualisation of Logical Relations, p. 326, by Smessaert, Hans | 2009 | Classical Sigma-7 | 4 | Octagon |
| | On the 3D Visualisation of Logical Relations, p. 327, by Smessaert, Hans | 2009 | Sigma-6 Graph | 4 | Cuboctahedron |
| | On the 3D Visualisation of Logical Relations, p. 327, by Smessaert, Hans | 2009 | Classical Sigma-7 | 4 | Rhombic Dodecahedron |
| | 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. 329, by Smessaert, Hans | 2009 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |