Small Substructures and Decidability Issues for First-Order Logic with Two Variables.

Emanuel Kieronski Martin Otto Small Substructures and Decidability Issues for First-Order Logic with Two Variables. 448-457 2005 conf/lics/2005 LICS http://dx.doi.org/10.1109/LICS.2005.49 db/conf/lics/lics2005.html#KieronskiO05