@article {6526,
	title = {Transitions and transversions in evolutionary descent: an approach to understanding},
	journal = {Journal of Molecular Evolution},
	volume = {19},
	year = {1983},
	note = {PDF},
	pages = {134- 144},
	keywords = {molecular characters, phylogenetics, transition/transversion ratio},
	author = {Holmquist, R.}
}
