P
[PV01] Nir Piterman and Moshe Y. Vardi. From Bidirectionality to Alternation. In MFCS'01, Lecture Notes in Computer Science 2136, pages 598-610. Springer-Verlag, August 2001. 
@inproceedings{mfcs2001-PV,
  author =              {Piterman, Nir and Vardi, Moshe Y.},
  title =               {From Bidirectionality to Alternation},
  editor =              {Sgall, Ji{\v r}{\'\i} and Pultr, Ales and Kolman,
                         Petr},
  booktitle =           {{P}roceedings of the 26th {I}nternational
                         {S}ymposium on {M}athematical {F}oundations of
                         {C}omputer {S}cience ({MFCS}'01)},
  acronym =             {{MFCS}'01},
  publisher =           {Springer-Verlag},
  series =              {Lecture Notes in Computer Science},
  volume =              {2136},
  pages =               {598-610},
  year =                {2001},
  month =               aug,
}
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