Roderic A. Girle. Logics for knowledge, possibility, and existence. Notre Dame Journal of Formal Logic, 19(2):200-214, 1978. [doi]
@article{Girle78,
title = {Logics for knowledge, possibility, and existence},
author = {Roderic A. Girle},
year = {1978},
doi = {10.1305/ndjfl/1093888314},
url = {http://dx.doi.org/10.1305/ndjfl/1093888314},
researchr = {https://researchr.org/publication/Girle78},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {19},
number = {2},
pages = {200-214},
}