@article{DLT-J-2008-Csuhaj-VarjuDV10,
	author        = "Erzsébet Csuhaj-Varjú and Jürgen Dassow and György Vaszil",
	doi           = "10.1142/S0129054110007428",
	journal       = "{International Journal of Foundations of Computer Science}",
	number        = 4,
	pages         = "549--569",
	publisher     = "{World Scientific}",
	title         = "{Variants of Competence-Based Derivations in CD Grammar Systems}",
	volume        = 21,
	year          = 2010,
}