| | Conversational Inference and Human Reasoning, p. 315, by Hilton, Denis J.; Geurts, Bart; Sedlmeier, Peter | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | Deriving the contrastiveness of contrastive -nun in Korean, p. 473, by Kim, Jieun | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | Deriving the contrastiveness of contrastive -nun in Korean, p. 474, by Kim, Jieun | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | Gottlob Frege: Begriffsschrift, eine der arithmetischen nachgebildete Formelsprache des reinen Denkens, p. 151, by Frege, Gottlob; Wille, Matthias (ed.) | 2018 | Classical Sigma-2 | 3 | Square |
| | Gottlob Frege: Begriffsschrift, eine der arithmetischen nachgebildete Formelsprache des reinen Denkens, p. 151, by Frege, Gottlob; Wille, Matthias (ed.) | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | Gottlob Frege: Begriffsschrift, eine der arithmetischen nachgebildete Formelsprache des reinen Denkens, p. 232, by Frege, Gottlob; Wille, Matthias (ed.) | 2018 | Classical Sigma-2 | 3 | Square |
| | Empty Negations and Existential Import in Aristotle, p. 204, by Corkum, Phil | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | Empty Negations and Existential Import in Aristotle, p. 205, by Corkum, Phil | 2018 | Degenerate Sigma-2 with Unconnectedness 4 | 4 | Rectangle |
| | Existential import and relations of categorical and modal categorical statements, p. 292, by Raclavský, Jiří | 2018 | Classical Sigma-2 | 3 | Square |
| | Philosophical and Mathematical Logic, p. 247, by de Swart, Harrie | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | An analogical hexagon, p. 5, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 3 | Triangle |
| | An analogical hexagon, p. 5, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 3 | Triangle |
| | An analogical hexagon, p. 5, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 3 | Triangle |
| | An analogical hexagon, p. 5, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 3 | Triangle |
| | An analogical hexagon, p. 6, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | An analogical hexagon, p. 6, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | An analogical hexagon, p. 7, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | An analogical hexagon, p. 7, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | An analogical hexagon, p. 7, by Beziau, Jean-Yves | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | An analogical hexagon, p. 7, by Beziau, Jean-Yves | 2018 | Classical Sigma-2 | 3 | Rectangle |
| | An analogical hexagon, p. 8, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3–4 | Hexagon |
| | An analogical hexagon, p. 8, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 4 | Triangle |
| | An analogical hexagon, p. 8, by Beziau, Jean-Yves | 2018 | Jacoby-Sesmat-Blanché Sigma-3 | 3–4 | Hexagon |
| | An analogical hexagon, p. 9, by Beziau, Jean-Yves | 2018 | A Single PCD | 2 | Digon |
| | An analogical hexagon, p. 9, by Beziau, Jean-Yves | 2018 | Contrariety 3-clique | 3 | Triangle |