@article {7580,
	title = {Combining data with different distributions of among-site variation},
	journal = {Systematic Biology},
	volume = {45},
	year = {1996},
	note = {PDF},
	pages = {375{\textendash}380},
	keywords = {among-site variation, ild, molecular characters, phylogenetics},
	author = {Sullivan, D. L.}
}
