Cysouw et al. 2012

Michael Cysouw and Dan Dediu and Steven Moran. 2012. Still No Evidence for an Ancient Language Expansion From Africa. Science. 335. Science. 657–bpp.

http://www.sciencemag.org/content/335/6069/657.2.full

@misc{Cysouw_etal2012,
  author    = {Michael Cysouw and Dan Dediu and Steven Moran},
  journal   = {Science},
  pages     = {657–b},
  publisher = {Science},
  title     = {Still No Evidence for an Ancient Language Expansion From Africa},
  url       = {http://www.sciencemag.org/content/335/6069/657.2.full},
  volume    = {335},
  year      = {2012}
}