@inbook {SankoffCedergren1983,
	title = {Simultaneuous comparison of three or more sequences related by a tree},
	booktitle = {Time Warps, String Edits, and Macromolecules: The Theory and Practice of Sequence Comparison},
	year = {1983},
	pages = {253{\textendash}263},
	publisher = {Addison-Wesley},
	organization = {Addison-Wesley},
	address = {Reading, {MA}},
	author = {Sankoff, D. and Cedergren, R. J.},
	editor = {Sankoff, David and Kruskal, Joseph B.}
}
@article {SankoffEtAl1973,
	title = {Evolution of {5S} {RNA} and the non-randomness of base replacement},
	journal = {Nat. New Biol.},
	volume = {245},
	year = {1973},
	pages = {232{\textendash}234},
	author = {Sankoff, D. and Morel, C. and Cedergren, R. J.}
}
