Peter K. Schotch, Raymond E. Jennings. Inference and necessity. J. Philosophical Logic, 9(3):327-340, 1980. [doi]
@article{SchotchJ80,
title = {Inference and necessity},
author = {Peter K. Schotch and Raymond E. Jennings},
year = {1980},
doi = {10.1007/BF00248398},
url = {http://dx.doi.org/10.1007/BF00248398},
researchr = {https://researchr.org/publication/SchotchJ80},
cites = {0},
citedby = {0},
journal = {J. Philosophical Logic},
volume = {9},
number = {3},
pages = {327-340},
}