@inproceedings{STOC-1985-FaginV,
	author        = "Ronald Fagin and Moshe Y. Vardi",
	booktitle     = "{Proceedings of the 17th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/22145.22179",
	pages         = "305--315",
	publisher     = "{ACM}",
	title         = "{An Internal Semantics for Modal Logic: Preliminary Report}",
	year          = 1985,
}