@article {Ungi2013b,
	title = {Perk Tutor: Open-source platform for ultrasound-guided needle intervention training},
	year = {2013},
	month = {02/2013},
	address = {Toronto, ON, Canada},
	author = {Tamas Ungi and Eric Moult and Andras Lasso and McGraw, Robert C and Gabor Fichtinger}
}
