| | How to Square Knowledge and Belief, p. 308, by Lenzen, Wolfgang | 2012 | Non-Sigma | 5 | Rectangle |
| | How to Square Knowledge and Belief, p. 308, by Lenzen, Wolfgang | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | How to Square Knowledge and Belief, p. 308, by Lenzen, Wolfgang | 2012 | Non-Sigma | 4 | Rectangle |
| | How to Square Knowledge and Belief, p. 308, by Lenzen, Wolfgang | 2012 | Non-Sigma | 4 | Rectangle |
| | How to Square Knowledge and Belief, p. 309, by Lenzen, Wolfgang | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | How to Square Knowledge and Belief, p. 309, by Lenzen, Wolfgang | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | How to Square Knowledge and Belief, p. 310, by Lenzen, Wolfgang | 2012 | Lenzen Sigma-4 | 5 | Rectangle |
| | How to Square Knowledge and Belief, p. 310, by Lenzen, Wolfgang | 2012 | Sigma-6 Ladder | 7 | Rectangle |
| | How to Square Knowledge and Belief, p. 311, by Lenzen, Wolfgang | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | Structures of Oppositions in Public Announcement Logic, p. 324, by Demey, Lorenz | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | Structures of Oppositions in Public Announcement Logic, p. 325, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 328, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 329, by Demey, Lorenz | 2012 | A Single PCD | 2 | Digon |
| | Structures of Oppositions in Public Announcement Logic, p. 330, by Demey, Lorenz | 2012 | Béziau Sigma-4 | 4 | Octagon |
| | Structures of Oppositions in Public Announcement Logic, p. 331, by Demey, Lorenz | 2012 | Béziau Sigma-4 | 4 | Octagon |
| | Structures of Oppositions in Public Announcement Logic, p. 335, by Demey, Lorenz | 2012 | Classical Sigma-7 | 4 | Rhombic Dodecahedron |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Structures of Oppositions in Public Announcement Logic, p. 336, by Demey, Lorenz | 2012 | Sherwood-Czeżowski Sigma-3 | 4 | Rectangle |
| | Logical Opposition and Collective Decisions, p. 350, by Kovač, Srećko | 2012 | Classical Sigma-2 | 3 | Rectangle |
| | Logical Opposition and Collective Decisions, p. 350, by Kovač, Srećko | 2012 | Sherwood-Czeżowski Sigma-3 | 4 | Hexagon |