@InProceedings{	  dk88alps,
  author	= "Volker Diekert and Manfred Kudlek",
  booktitle	= "Proc. 2nd Conference on Automata, Languages and
		  Programming Systems, Salg{\'o}tarj{\'a}n (Hungary) 1988",
  editor	= "F. Gecseg and others",
  number	= "DM 88-4",
  pages		= "77--87",
  publisher	= "Department of Mathematics, Karl Marx University of
		  Economics",
  title		= "Small deterministic {T}uring machines",
  year		= "1988"
}