@misc{soberon-2017-graph-homomorphism-partition-function,
  title = {{Computing the Partition Function for Graph Homomorphisms}},
  author = {Alexander Barvinok and Pablo Soberón},
  year = {2017},
  eprint = {1410.1842},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1410.1842},
  note = {Combinatorica 37 (4), 633–650.}
}