@article {98,
	title = {How discrete are oak species? Insights from a hybrid zone between Quercus grisea and Quercus gambelii.},
	journal = {Evolution},
	volume = {51},
	year = {1997},
	note = {doi:10.2307/2411151},
	month = {1997},
	pages = {747 - 755},
	abstract = {not aviable},
	author = {Howard, D. and Preszler, R. and Williams, J. and Fenchel, S. and Boecklen, W.}
}
