Jie Fan. Two Variants of Noncontingency Operator. Notre Dame Journal of Formal Logic, 62(3), 2021. [doi]
@article{Fan21-19, title = {Two Variants of Noncontingency Operator}, author = {Jie Fan}, year = {2021}, doi = {10.1215/00294527-2021-0025}, url = {https://doi.org/10.1215/00294527-2021-0025}, researchr = {https://researchr.org/publication/Fan21-19}, cites = {0}, citedby = {0}, journal = {Notre Dame Journal of Formal Logic}, volume = {62}, number = {3}, }