@article {16380,
	title = {Definitions of dependence distance},
	journal = {ACM Letters on Programming Languages and SystemsACM Lett. Program. Lang. Syst.},
	volume = {1},
	year = {1992},
	month = {1992/09//},
	pages = {261 - 265},
	isbn = {10574514},
	doi = {10.1145/151640.151645},
	url = {http://dl.acm.org/citation.cfm?id=151645},
	author = {Pugh, William}
}
