@article {7871,
	title = {An index of substitution saturation and its application},
	journal = {Molecular Phylogenetics and Evolution},
	volume = {26},
	year = {2003},
	note = {PDF},
	pages = {1-7},
	keywords = {molecular characters, phylogenetics, saturation},
	author = {Xia, Xuhua and Xie, Zheng and Salemi, Marco and Chen, Lu and Wang, Yong}
}
