@conference {4680,
	title = {Research and Development expenditure in the business sector as indicator of knowledge economy: the Portuguese experience},
	booktitle = {IET Working Papers Series},
	year = {2007},
	publisher = {FCT-UNL},
	organization = {FCT-UNL},
	address = {Caparica},
	author = {Nuno Boavida and Ant{\'o}nio Brand{\~a}o Moniz}
}
