@inproceedings{DBLP:conf/tamc/Ambos-SpiesBG08,
  author    = {Klaus Ambos-Spies and
               Serikzhan Badaev and
               Sergey Goncharov},
  title     = {On a Question of Frank Stephan},
  booktitle = {TAMC},
  year      = {2008},
  pages     = {423-432},
  ee        = {http://dx.doi.org/10.1007/978-3-540-79228-4_37},
  crossref  = {DBLP:conf/tamc/2008},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/tamc/2008,
  editor    = {Manindra Agrawal and
               Ding-Zhu Du and
               Zhenhua Duan and
               Angsheng Li},
  title     = {Theory and Applications of Models of Computation, 5th International
               Conference, TAMC 2008, Xi'an, China, April 25-29, 2008.
               Proceedings},
  booktitle = {TAMC},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {4978},
  year      = {2008},
  isbn      = {978-3-540-79227-7},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}