@book{jackson01software,
	title = {Problem frames: analyzing and structuring software development problems},
	author = {Michael Jackson},
	publisher = {Addison-Wesley},
	url = {http://www.jacksonworkbench.co.uk/stevefergspages/pfa/},
	year = {2001},
	biburl = {http://www.bibsonomy.org/bibtex/269415c7193811b820a0ae8bafd1fb349/msn},
	isbn = {0-201-59627-X},
	keywords = {cites.dss.r cites.pclass info.refs.books research.cs.softeng }
}