| | Aristotelian Logic, p. 156, by Parry, William T.; Hacker, Edward A. | 1991 | Classical Sigma-2 | 3 | Square |
| | Aristotelian Logic, p. 156, by Parry, William T.; Hacker, Edward A. | 1991 | Classical Sigma-2 | 3 | Square |
| | Aristotelian Logic, p. 165, by Parry, William T.; Hacker, Edward A. | 1991 | Classical Sigma-2 | 3 | Square |
| | Aristotelian Logic, p. 168, by Parry, William T.; Hacker, Edward A. | 1991 | Sigma-0 Graph | 1 | Square |
| | Aristotelian Logic, p. 169, by Parry, William T.; Hacker, Edward A. | 1991 | Sigma-0 Graph | 1 | Square |
| | Aristotelian Logic, p. 169, by Parry, William T.; Hacker, Edward A. | 1991 | Sigma-0 Graph | 1 | Square |
| | Aristotelian Logic, p. 169, by Parry, William T.; Hacker, Edward A. | 1991 | Sigma-0 Graph | 1 | Square |
| | Aristotelian Logic, p. 172, by Parry, William T.; Hacker, Edward A. | 1991 | Sigma-0 Graph | 1 | Square |
| | A Note on Scepticism, p. 18, by Woleński, Jan | 1992 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | L' art d' argumenter: Structures rhétoriques et littéraires, p. 79, by Declercq, Gilles | 1992 | Classical Sigma-2 | 3 | Square |
| | L' art d' argumenter: Structures rhétoriques et littéraires, p. 79, by Declercq, Gilles | 1992 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 107, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 109, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 110, by Simons, Peter | 1993 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Cube |
| | Opposition, Obversion, and Duality, p. 111, by Simons, Peter | 1993 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Triangle |
| | Opposition, Obversion, and Duality, p. 111, by Simons, Peter | 1993 | Jacoby-Sesmat-Blanché Sigma-3 | 3 | Hexagon |
| | Opposition, Obversion, and Duality, p. 116, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 116, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 118, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | Opposition, Obversion, and Duality, p. 118, by Simons, Peter | 1993 | Classical Sigma-2 | 3 | Square |
| | The Introductiones dialecticae secundum Wilgelmum and secundum G. Paganellum, p. 91, by Champeaux, William; Iwakuma, Yukio (ed.) | 1993 | Classical Sigma-2 | 3 | Rectangle |
| | Jacobus Arminius and his Logic: Analysis of a Letter, p. 124, by Dekker, Eef | 1993 | Classical Sigma-2 | 3 | Rectangle |
| | Introduction to Medieval Logic, p. 140, by Broadie, Alexander | 1993 | Classical Sigma-2 | 3 | Rectangle |
| | Introduction to Medieval Logic, p. 148, by Broadie, Alexander | 1993 | Classical Sigma-2 | 3 | Rectangle |
| | Logical Negation in English?, p. 133, by Peterson, Philip L. | 1993 | Lenzen Sigma-4 | 5 | Rectangle |