@article{Head:1981,
	key = "Head 1981",
	author = "T. Head",
	title = "Fixed languages and the adult languages of ${0L}$ schemes",
	journal = IJCM,
	volume = 10,
	year = 1981,
	pages = "103-107"}

@incollection{Head&Lando:1986,
	key = "Head and Lando 1986",
	author = "T. Head and B. Lando",
	title = "Fixed and stationary $\omega$-words and $\omega$-languages",
	booktitle = "The Book of L",
	editor = "G. Rozenberg and A. Salomaa",
	publisher = SV,
	year = 1986,
	pages = "147-156"}

@article{Culik:1978,
	key = "Culik 1978",
	author = "Culik {II}, K.",
	title = "The ultimate equivalence problem for {D0L} systems",
	journal = AI,
	volume = 10,
	year = 1978,
	pages = "79-84",
	comment = "checked"}

@article{Linna:1977,
	key = "Linna 1977",
	author = "M. Linna",
	title = "The decidability of the {D0L} prefix problem",
	journal = IJCM,
	volume = 6,
	year = 1977,
	pages = "127-142"}

@article{Terlutte:1987,
	key = "Terlutte 1987",
	author = "A. Terlutte",
	title = "Sur les centres de {D0L}-langages",
	journal = RAIRO,
	volume = 21,
	year = 1987,
	pages = "137-145"}

@inproceedings{Ehrenfeucht&Rozenberg:1977,
	key = "Ehrenfeucht and Rozenberg 1977",
	author = "A. Ehrenfeucht and G. Rozenberg",
	title = "On simplifications of {PD0L} systems",
	booktitle = "Proceedings of a Conference on Theoretical Computer Science",
	publisher = "Computer Science Department, University of Waterloo",
	year = 1977,
	pages = "81-87"}

@incollection{Head:1984,
	key = "Head 1984",
	author = "T. Head",
	title = "Adherence equivalence is decidable for {D0L} languages",
	booktitle = STACS84,
	series = LNICS,
	publisher = SV,
	volume = 166,
	editor = "M. Fontet and K. Mehlhorn",
	year = 1984,
	pages = "241-249"}

@book{Rozenberg&Salomaa:1980,
	key = "Rozenberg and Salomaa 1980",
	author = "G. Rozenberg and A. Salomaa",
	title = "The Mathematical Theory of L Systems",
	publisher = AP,
	series = "Pure and Applied Mathematics",
	volume = 90,
	year = 1980}

@incollection{Kobayashi&Otto:1997,
	key = "Kobayashi and Otto 1997",
	author = "Y. Kobayashi and F. Otto",
	title = "Repetitiveness of {D0L}-languages is decidable in
polynomial time",
	booktitle = MFCS97,
	year = 1997,
	publisher = SV,
	series = LNICS,
	volume = 1295,
	editor = "I. {Pr\'{\i}vara} and P. {Ru\v zi\v cka}",
	pages = "337-346"}

@incollection{Cassaigne:1994,
	key = "Cassaigne 1994",
	author = "J. Cassaigne",
	title = "An algorithm to test if a given circular {HDOL}-language
avoids a pattern",
	booktitle = "Proc. 13th World Computer Congress 94, Vol. I",
	series = "IFIP Trans. A Comput. Sci. Tech.",
	volume = "A-51",
	editor = "B. Pehrson and I. Simon",
	year = 1994,
	publisher = "Elsevier",
	pages = "459-464"}

@article{Harju:1977,
	key = "Harju 1977",
	author = "T. Harju",
	title = "A polynomial recognition algorithms for the {EDT0L} languages",
	journal = EIK,
	volume = 13,
	year = 1977,
	pages = "169-177"}

@article{Herman&Lindenmayer&Rozenberg:1975,
	key = "Herman, Lindenmayer, and Rozenberg 1975",
	author = "G. T. Herman and A. Lindenmayer and G. Rozenberg",
	title = "Description of developmental languages using
recurrence systems",
	journal = MST,
	volume = 8,
	year = 1975,
	pages = "316-341"}

@incollection{Lopez&Narbel:1998,
	key = "Lopez and Narbel 1998",
	author = "L.-M. Lopez and P. Narbel",
	title = "{D0L}-systems and surface automorphisms",
	booktitle = MFCS98,
	series = LNICS,
	volume = 1450,
	year = 1998,
	editor = "L. Brim and J. Gruska and J. {Zlatu\v ska}",
	publisher = SV,
	pages = "522-532"}

@incollection{Damm&Holzer&Lange&Rossmanith:1994,
	key = "Damm, Holzer, Lange, and Rossmanith 1994",
	author = "C. Damm and M. Holzer and K.-J. Lange and P. Rossmanith",
	title = "Deterministic {0L} languages are of very low
complexity:  {D0L} is in {$AC^0$}",
	booktitle = "Developments in Language Theory",
	editor = "G. Rozenberg and A. Salomaa",
	publisher = WSP,
	year = 1994,
	pages = "305-313"}

@incollection{Damm&Holzer&Lange:1992,
	key = "Damm, Holzer, and Lange 1992",
	author ="Damm, C. and Holzer, M. and Lange, K.-J.",
	title = "Parallel complexity of iterated morphisms and the 
arithmetic of small numbers",
	series = LNICS,
	booktitle = MFCS92,
	year = 1992,
	volume = 629,
	publisher = SV,
	editor = "I. M. Havel and V. Koubek",
	pages = "227-235"}

@article{Honkala:2001b,
	key = "Honkala 2001b",
	author = "J. Honkala",
	title = "A polynomial bound for certain cases of the {D0L}
sequence equivalence problem",
	journal = THCS,
	volume = 34,
	year = "{\noopsort{2001b}}2001",
	pages = "263-272"}

@article{Honkala:1999,
	key = "Honkala 1999",
	author = "J. Honkala",
	title = "On algebraicness of {D0L} power series",
	journal = JUCS,
	volume = 5,
	year = 1999,
	pages = "11-19"}

@article{Honkala:2001c,
	key = "Honkala 2001c",
	author = "J. Honkala",
	title = "Easy cases of the {D0L} sequence equivalence problem",
	journal = DAM,
	volume = 113,
	year = "{\noopsort{2001c}}2001",
	pages = "285-290"}