@article{payne2011a,
  title={Exact solutions for social and biological contagion models on mixed directed and undirected, degree-correlated random networks},
  author={Joshua L. Payne and Kameron D. Harris and Peter Sheridan Dodds},
  journal={Physical Review E},
  volume={84},
  pages={016110},
  journalpage={http://pre.aps.org/abstract/PRE/v84/i1/e016110},
  year={2011},
  citations={12}
}