@inbook {Maddison1997_324,
	title = {Nexus: An extensible file format for systematic information},
	booktitle = {Systematic Biology},
	volume = {46},
	year = {1997},
	pages = {590{\textendash}621},
	author = {Maddison, David R. and Swofford, David L. and Maddison, Wayne P.}
}
