Yevgeny Kazakov, Ian Pratt-Hartmann. A Note on the Complexity of the Satisfiability Problem for Graded Modal Logics. In Proceedings of the 24th Annual IEEE Symposium on Logic in Computer Science, LICS 2009, 11-14 August 2009, Los Angeles, CA, USA. pages 407-416, IEEE Computer Society, 2009. [doi]
Abstract is missing.