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 | 1951 | |
|---|---|---|
| 3 |      | Soren Hallden: On the Semantic Non-Completeness of Certain Lewis Calculi. J. Symb. Log. 16(2): 127-129 (1951) |
| 1949 | ||
| 2 | | Soren Hallden: Results Concerning the Decision Problem of Lewis's Calculi S3 and S6. J. Symb. Log. 14(4): 230-236 (1949) |
| 1948 | ||
| 1 | | Soren Hallden: A Note Concerning the Paradoxes of Strict Implication and Lewis's System S1. J. Symb. Log. 13(3): 138-139 (1948) |