Automorphism Groups of Graphical Models and Lifted Variational Inference, Hung Bui, Tuyen N. Huynh and Sebastian Riedel, arXiv.org 2012 Extended version of the paper to appear in Statistical Relational AI (StaRAI-12) workshop at UAI '12 [pdf] 
@inproceedings{bui12automorphismextended,
    note={Extended version of the paper to appear in Statistical Relational AI (StaRAI-12) workshop at UAI '12}, 
    webnote={Extended version of the paper to appear in Statistical Relational AI (StaRAI-12) workshop at UAI '12}, 
    month={July}, 
    year={2012}, 
    author={Hung Bui and Tuyen N. Huynh and Sebastian Riedel}, 
    bdsk-url-1={http://arxiv.org/pdf/1207.4814v1.pdf}, 
    booktitle={arXiv.org}, 
    title={Automorphism Groups of Graphical Models and Lifted Variational Inference}, 
}