@inproceedings{CSL-1999-Marcinkowski,
	author        = "Jerzy Marcinkowski",
	booktitle     = "{Proceedings of the 13th International Workshop on Computer Science Logic / Eighth Annual Conference of the EACSL}",
	doi           = "10.1007/3-540-48168-0_24",
	isbn          = "3-540-66536-6",
	pages         = "338--349",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Directed Reachability: From Ajtai-Fagin to Ehrenfeucht-Fraïssé Games}",
	volume        = 1683,
	year          = 1999,
}