@article{maassarani_2000, 
  title={Series expansions for lattice Green functions}, 
  volume={33}, 
  DOI={10.1088/0305-4470/33/32/306}, 
  number={32}, 
  publisher={IOP Publishing}, 
  author={Maassarani}, 
  year={2000}, 
  month={Aug}
  }