A. J. Dale. Material equivalence and tautological entailment. Notre Dame Journal of Formal Logic, 23(4):435-442, 1982. [doi]
@article{Dale82,
title = {Material equivalence and tautological entailment},
author = {A. J. Dale},
year = {1982},
doi = {10.1305/ndjfl/1093870155},
url = {http://dx.doi.org/10.1305/ndjfl/1093870155},
researchr = {https://researchr.org/publication/Dale82},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {23},
number = {4},
pages = {435-442},
}