@unpublished{publication-16254,
	author={Rupietta, Christian and Pfeifer, Harald and Backes-Gellner, Uschi},
	institution={University of Zurich},
	number=131,
	series={Swiss Leading House "Economics of Education" Working Paper},
	title={Firms' knowledge acquisition during dual-track VET: Which sources are important for innovativeness?},
	year=2017,
}