@conference {19803,
	title = {<span lang="EN-US">Studying primary and secondary teachers{\textquoteright} collaborative design of resources for algebra</span>},
	booktitle = {Proceedings of the twenty-fifth ICMI Study {\textquotedblleft}Teachers of Mathematics Working and Learning in Collaborative Groups{\textquotedblright}},
	year = {2020},
	pages = {668-675},
	publisher = {University of Lisbon},
	organization = {University of Lisbon},
	author = {G Psycharis and J. Trgalov{\'a} and M D Alturkmani and E Kalogeria and M Latsi and S Roubin},
	editor = {H Borko and D Potari}
}
