Humberstone, I. L. Singulary extensional connectives: A closer look. (English) Zbl 0874.03010 J. Philos. Log. 26, No. 3, 341-356 (1997). MSC: 03B22 × Cite Format Result Cite Review PDF Full Text: DOI
Humberstone, Lloyd The lattice of extensional connectives: A correction. (English) Zbl 0682.03013 J. Philos. Logic 17, No. 3, 221-223 (1988). Reviewer: F.Veltman MSC: 03B65 03B45 03A05 × Cite Format Result Cite Review PDF Full Text: DOI