A
[APT79] Bengt Aspvall, Michael F. Plass, and Robert Endre Tarjan. A Linear-Time Algorithm for Testing the Truth of Certain Quantified Boolean Formulas. Information Processing Letters 8(3):121-123. Elsevier, March 1979. erratum as \citeipl14(4)-APT. 
@article{ipl8(3)-APT,
  author =              {Aspvall, Bengt and Plass, Michael F. and Tarjan,
                         Robert Endre},
  title =               {A Linear-Time Algorithm for Testing the Truth of
                         Certain Quantified Boolean Formulas},
  publisher =           {Elsevier},
  journal =             {Information Processing Letters},
  volume =              {8},
  number =              {3},
  pages =               {121-123},
  year =                {1979},
  month =               mar,
  note =                {erratum as~\cite{ipl14(4)-APT}},
}
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