@article {7576,
	title = {Character coding and inapplicable data},
	journal = {Cladistics},
	volume = {15},
	year = {1999},
	note = {PDF},
	pages = {363{\textendash}371},
	keywords = {character coding, missing data, phylogenetics},
	author = {Strong, Ellen E. and Lipscomb, Diana}
}
