C
[tC06] Balder ten Cate. Expressivity of Second Order Propositional Modal Logic. Journal of Philosophical Logic 35(2):209-223. Springer-Verlag, September 2006. 
@article{jpl35(2)-Cat,
  author =              {ten Cate, Balder},
  title =               {Expressivity of Second Order Propositional Modal
                         Logic},
  publisher =           {Springer-Verlag},
  journal =             {Journal of Philosophical Logic},
  volume =              {35},
  number =              {2},
  pages =               {209-223},
  year =                {2006},
  month =               sep,
}
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