| | Aristotle's Squares of Opposition, p. 321, by Correia, Manuel | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Aristotle's Squares of Opposition, p. 322, by Correia, Manuel | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Aristotle's Squares of Opposition, p. 323, by Correia, Manuel | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Aristotle's Squares of Opposition, p. 323, by Correia, Manuel | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 229, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 229, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 229, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 231, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 231, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 231, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 233, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 233, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 233, by Smessaert, Hans; Demey, Lorenz | 2017 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 233, by Smessaert, Hans; Demey, Lorenz | 2017 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 236, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 236, by Smessaert, Hans; Demey, Lorenz | 2017 | | | Digon |
| | Duality Patterns in 2-PCD Fragments, p. 236, by Smessaert, Hans; Demey, Lorenz | 2017 | | | Digon |
| | Duality Patterns in 2-PCD Fragments, p. 240, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 240, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Square |
| | Duality Patterns in 2-PCD Fragments, p. 240, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Square |
| | Duality Patterns in 2-PCD Fragments, p. 240, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Octagon |
| | Duality Patterns in 2-PCD Fragments, p. 241, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Rectangle |
| | Duality Patterns in 2-PCD Fragments, p. 241, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Square |
| | Duality Patterns in 2-PCD Fragments, p. 241, by Smessaert, Hans; Demey, Lorenz | 2017 | Classical Sigma-2 | 3 | Square |
| | Duality Patterns in 2-PCD Fragments, p. 241, by Smessaert, Hans; Demey, Lorenz | 2017 | Moretti-Pellissier Sigma-4 | 4 | Octagon |