@article {Simula.SE.267,
	title = {Using Simulation to Analyse the Impact of Software Requirement Volatility on Project Performance},
	journal = {Information and Software Technology},
	volume = {42},
	number = {14},
	year = {2000},
	pages = {1001-1008},
	author = {Pfahl, Dietmar and Lebsanft, Karl}
}
