Walker et al. 2012

Walker, Robert S. and Wichmann, Søren and Mailund, Thomas and Atkisson, Curtis J. 2012. Cultural phylogenetics of the Tupi language family in lowland South America. PloS one 7. Public Library of Science.

@article{walker2012cultural,
  author    = {Walker, Robert S. and Wichmann, Søren and Mailund, Thomas and Atkisson, Curtis J.},
  journal   = {PloS one},
  number    = {4},
  publisher = {Public Library of Science},
  title     = {Cultural phylogenetics of the Tupi language family in lowland South America},
  volume    = {7},
  year      = {2012}
}