@book{43799,
	author = {Plakitsi, Katerina,},
	title = {Activity Theory in Formal and Informal Science Education /},
	publisher = {Brill | Sense,},
	year = {2013.},
	series = {Cultural and Historical Perspectives on Science Education ;},
	address = {Leiden; },
	url = {http://dx.doi.org/10.1007/978-94-6091-317-4}
}