@article {19775,
	title = {Activity theoretical approaches to mathematics classroom practices with the use of technology},
	journal = {International Journal for Technology in Mathematics Education},
	volume = {19},
	year = {2012},
	pages = {127-134},
	author = {F Vandebrouck and G Chiappini and B Jaworski and J-B Lagrange and J Monaghan and G Psycharis}
}
