@phdthesis{publication-536,
	author={Bj{\"o}rck, Johan},
	editor={Volkart, Rolf and Geiger, Hans},
	faculty={Faculty of Economics, Business Administration and Information Technology},
	institution={University of Zurich},
	pages=160,
	title={The persistence of financial performance and the competitive advantage period: an empirical analysis},
	year=2008,
}