@article {6844,
	title = {Outgroup analysis and parsimony},
	journal = {Systematic Zoology},
	volume = {33},
	year = {1984},
	note = {PDF},
	pages = {83{\textendash}103},
	author = {Maddison, W. P. and Donoghue, M. J. and Maddison, D. R.}
}
@article {6181,
	title = {The importance of fossils in phylogeny reconstruction},
	journal = {Annual Review of Ecology and Systematics},
	volume = {20},
	year = {1989},
	note = {do not have},
	pages = {431-460},
	author = {Donoghue, M. J. and Doyle, J. A. and Gauthier, J. and Kluge, A. G. and Rowe, T.}
}
@article {6187,
	title = {The importance of fossils in elucidating seed plant phylogeny and macroevolution},
	journal = {Review of Paleobotany and Palynology},
	volume = {50},
	year = {1987},
	note = {do not have},
	pages = {63-95},
	author = {Doyle, J. A. and Donoghue, M. J.}
}
