@article{CammarotoChinni2000JMAA,
  author  = {Filippo Cammaroto and Antonia Chinnì},
  title   = {A Liouville-Type Theorem for Harmonic Functions on Exterior Domains},
  journal = {Journal of Mathematical Analysis and Applications},
  volume  = {244},
  number  = {1},
  pages   = {1--9},
  year    = {2000},
  doi     = {10.1006/jmaa.1999.6660}
}