@book{16616,
	author = {Blumschein, Patrick,},
	title = {Model-Based Approaches to Learning :},
	publisher = {Brill | Sense,},
	year = {2009.},
	series = {Modeling and Simulation for Learning and Instruction;},
	address = {Leiden, },
	url = {http://dx.doi.org/10.1163/9789087907112}
}