@article{DLT-J-2012-LehtinenO13,
	author        = "Tommi Lehtinen and Alexander Okhotin",
	doi           = "10.1142/S0129054113400303",
	journal       = "{International Journal of Foundations of Computer Science}",
	number        = 7,
	pages         = "1049--1066",
	publisher     = "{World Scientific}",
	title         = "{Homomorphisms Preserving Deterministic Context-Free Languages}",
	volume        = 24,
	year          = 2013,
}