@misc{4290,
  author       = {Barton, Nicholas H},
  booktitle    = {Genetical Research},
  issn         = {0016-6723},
  number       = {2},
  pages        = {178 -- 180},
  publisher    = {Cambridge University Press},
  title        = {{Natural hybridization and evolution}},
  volume       = {70},
  year         = {1997},
}