@inproceedings{DLT-2001-HalavaH,
	author        = "Vesa Halava and Tero Harju",
	booktitle     = "{Revised Papers of the Fifth International Conference on Developments in Language Theory}",
	doi           = "10.1007/3-540-46011-X_26",
	isbn          = "3-540-43453-4",
	pages         = "304--310",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{An Undecidability Result Concerning Periodic Morphisms}",
	volume        = 2295,
	year          = 2001,
}