Stéphane Demri. A Completeness Proof for a Logic with an Alternative Necessity Operator. Studia Logica, 58(1):99-112, 1997.
@article{Demri97, title = {A Completeness Proof for a Logic with an Alternative Necessity Operator}, author = {Stéphane Demri}, year = {1997}, tags = {completeness, logic}, researchr = {https://researchr.org/publication/Demri97}, cites = {0}, citedby = {0}, journal = {Studia Logica}, volume = {58}, number = {1}, pages = {99-112}, }