@conference {19829,
	title = {Combining theoretical frameworks to investigate the potential of computer environments offering integrated geometrical and algebraic representations},
	booktitle = {Proceedings of the 10th International Conference on Technology in Mathematics Teaching},
	year = {2011},
	pages = {197-202},
	address = {Portsmouth, UK},
	author = {J-B Lagrange and G Psycharis},
	editor = {M Joubert and A. Clark-Wilson and M McCabe}
}
