@article {7874,
	title = {Maximum likelihood phylogenetic estimation from DNA sequences with variable rates over sites: approximate methods},
	journal = {Journal of Molecular Evolution},
	volume = {39},
	year = {1994},
	note = {PDF},
	pages = {306-314},
	keywords = {gamma distribution, ML, phylogenetics},
	author = {Yang, Z.}
}
@article {7875,
	title = {Phylogenetic analysis using parsimony and likelihood methods},
	journal = {Journal of Molecular Evolution},
	volume = {42},
	year = {1996},
	note = {DO NOT HAVE},
	pages = {294-307},
	keywords = {ML, parsimony, phylogenetics},
	author = {Yang, Z.}
}
@book {7877,
	title = {Computational molecular evolution},
	series = {Oxford University Press},
	year = {2006},
	note = {DO NOT HAVE},
	pages = {376},
	address = {Oxford and New York},
	keywords = {phylogenetics},
	author = {Yang, Z.}
}
@article {7878,
	title = {Estimation of the transition/transversion rate bias and species sampling},
	journal = {Journal of Molecular Evolution},
	volume = {48},
	year = {1999},
	note = {PDF},
	pages = {274{\textendash}283},
	keywords = {bias, molecular characters, saturation, transition/transversion ratio},
	author = {Yang, Z. and Yoder, A. D.}
}
