A
[AD09] Timos Antonopoulos and Anuj Dawar. Separating Graph Logic from MSO. In FoSSaCS'09, Lecture Notes in Computer Science 5504, pages 63-77. Springer-Verlag, March 2009. 
@inproceedings{fossacs2009-AD,
  author =              {Antonopoulos, Timos and Dawar, Anuj},
  title =               {Separating Graph Logic from~{MSO}},
  editor =              {de Alfaro, Luca},
  booktitle =           {{P}roceedings of the 12th {I}nternational
                         {C}onference on {F}oundations of {S}oftware
                         {S}cience and {C}omputation {S}tructure
                         ({FoSSaCS}'09)},
  acronym =             {{FoSSaCS}'09},
  publisher =           {Springer-Verlag},
  series =              {Lecture Notes in Computer Science},
  volume =              {5504},
  pages =               {63-77},
  year =                {2009},
  month =               mar,
}
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